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1. Pneumatic vertical transport characteristics of the graphite pebble in a high temperature gas-cooled reactor

Author:
Sun, Qi; Ye, Ping; Peng, Wei; Zhou, Hongbo; Yu, Suyuan
Source:
Powder technology 2020 v.371 pp. 256-266
ISSN:
0032-5910
Subject:
impact strength,   etc   ; aerodynamics; dynamic models; graphene; helium; hydrodynamics; temperature;     Show all 7 Subjects
Abstract:
... A graphite pebble lifting test platform was used to study the aerodynamic characteristics and collision behavior of graphite pebble in the lifting pipe. The impact strength of the pipe wall during pneumatic transport was measured by acceleration sensors and the number of collisions is counted by another visualization experiment. Meanwhile, hydrodynamic theory was combined with a dynamics model of ...
DOI:
10.1016/j.powtec.2020.05.095

2. The Effect of Different Acrylic-Based Rubbers on the Crystallization Behavior of PLA/PDLA Stereocomplex

Author:
Phattarateera, Supanut; Pattamaprom, Cattaleeya
Source:
Journal of polymers and the environment 2020 v.28 no.6 pp. 1592-1600
ISSN:
1566-2543
Subject:
impact strength,   etc   ; crystallization; crystals; mixing; polylactic acid; rubber; thermal properties;     Show all 7 Subjects
Abstract:
... This study investigated the performance of two acrylic rubbers on the improvement of mechanical and thermal properties of polylactic acid (PLA)/ poly(D-lactide) (PDLA) stereocomplex. The selected acrylic-based rubbers consisted of a commercial acrylic rubber (ACM) and acrylic core–shell rubber (CSR). In this work, 5 wt% PDLA was melt-blended with PLA to form PLA/PDLA stereocomplex (ST) in the pres ...
DOI:
10.1007/s10924-020-01707-w

3. Finite Element Analysis of Beams Reinforced with Banana Fiber Bars (BFB)

Author:
Elbehiry, Amgad; Mostafa, Marwan
Source:
Fibers 2020 v.8 no.8
ISSN:
2079-6439
Subject:
impact strength,   etc   ; bananas; composite materials; construction materials; finite element analysis; natural fibers;     Show all 6 Subjects
Abstract:
... One of the challenges of the century is to reach compatibility between the required resistance and the usage of lightweight building materials that may negatively affect the mechanical properties. Natural fibers nowadays are used as enhancers in the industrial field. Hence, the fibers contribute by giving an ideal solution to improve mechanical proprieties of the structural elements such as tensil ...
DOI:
10.3390/fib8080052

4. Laboratory study on recycled concrete aggregate based asphalt mixtures for sustainable flexible pavement surfacing

Author:
Nwakaire, Chidozie Maduabuchukwu; Yap, Soon Poh; Yuen, Choon Wah; Onn, Chiu Chuen; Koting, Suhana; Babalghaith, Ali Mohammed
Source:
Journal of cleaner production 2020 v.262 pp. 121462
ISSN:
0959-6526
Subject:
impact strength,   etc   ; abrasion resistance; bitumen; concrete; granite; pavements; recycling; solid wastes; tensile strength; waste disposal;     Show all 10 Subjects
Abstract:
... Utilisation of recycled concrete aggregates (RCA) for highway pavement construction has been a sustainable attempt towards conservation of the natural resource base as well as mitigation against the environmental problems associated with harmful solid waste disposal. The performances of asphalt mixtures with 20%, 40%, 60%, 80% and 100% of coarse granite as well as 100% of coarse and fine granite r ...
DOI:
10.1016/j.jclepro.2020.121462

5. Covalent polymer functionalized graphene oxide/poly(ether ether ketone) composites for fused deposition modeling: improved mechanical and tribological performance

Author:
Yang, Cheng; Xu, Jing; Xing, Yue; Hao, Sijia; Ren, Zhidong
Source:
RSC advances 2020 v.10 no.43 pp. 25685-25695
ISSN:
2046-2069
Subject:
impact strength,   etc   ; adhesion; aromatic compounds; chemical bonding; friction; graphene oxide; manufacturing; melting; mixing; models; moieties; polymers;     Show all 12 Subjects
Abstract:
... This paper presents a novel method using poly(aryl ether ketone) containing pendant carboxyl groups to covalently functionalize graphene oxide. The functionalized graphene oxide (LFG) was used to prepare poly(ether ether ketone) (PEEK) composites through melt blending. It is found that LFG has great interface adhesion to the PEEK matrix, and just a small amount of it can simultaneously improve the ...
DOI:
10.1039/d0ra04418k

6. Simultaneous improvement of processability and toughness of highly filled MH/LLDPE composites by using fluorine-containing flow modifiers

Author:
Cao, Bo; Zhou, Yubin; Wu, Yancheng; Cai, Jianan; Guan, Xiaoxiao; Liu, Shumei; Zhao, Jianqing; Zhang, Mingqiu
Source:
Composites 2020 v.134 pp. 105900
ISSN:
1359-835X
Subject:
impact strength,   etc   ; composite materials; energy; magnesium hydroxide; melting; polyethylene; torque; viscosity;     Show all 8 Subjects
Abstract:
... Processability and toughness are crucial to the industrial production of highly filled polymer-based composites. In this work, a strategy is proposed for simultaneously improving the processability and toughness of highly filled magnesium hydroxide (MH)/linear low-density polyethylene (LLDPE) composites with the aid of flow modifiers. Fluorine-containing flow modifiers (PMFs) with low surface ener ...
DOI:
10.1016/j.compositesa.2020.105900

7. Analyzing dynamic impacts of different oil shocks on oil price

Author:
Gong, Xu; Chen, Liqiang; Lin, Boqiang
Source:
Energy 2020 v.198 pp. 117306
ISSN:
0360-5442
Subject:
impact strength,   etc   ; economic crises; inventories; issues and policy; models; oils; prices;     Show all 7 Subjects
Abstract:
... This paper constructs a five-variable time-varying vector autoregressive model based on oil price, oil aggregate supply, oil aggregate demand, global oil inventory, and speculative demand. This model is used to study the dynamic impacts of different oil shocks on oil price from 2002 to 2018, focusing on how different oil shocks affect oil price fluctuation over time. Empirical results show that ea ...
DOI:
10.1016/j.energy.2020.117306

8. Wettability, interfacial reactions, and impact strength of Sn–3.0Ag–0.5Cu solder/ENIG substrate used for fluxless soldering under formic acid atmosphere

Author:
He, Siliang; Gao, Runhua; Shen, Yu-An; Li, Jiahui; Nishikawa, Hiroshi
Source:
Journal of materials science 2020 v.55 no.7 pp. 3107-3117
ISSN:
0022-2461
Subject:
impact strength,   etc   ; environmental impact; formic acid; gold; melting; microstructure; nickel; packaging; rosin; soldering; wettability;     Show all 11 Subjects
Abstract:
... Fluxes have a negative impact on the environment; as a result, fluxless soldering has become a promising method in electronic packaging. However, detailed studies on fluxless soldering are very rare, especially those involving the use of electroless nickel immersion gold (ENIG) substrate under formic acid (FA) atmosphere that can effectively reduce the majority of solders. In this work, the charac ...
DOI:
10.1007/s10853-019-04153-9

9. Epoxy thermoset with enhanced flame retardancy and physical-mechanical properties based on reactive phosphaphenanthrene compound

Author:
Jin, Shanglin; Liu, Zhen; Qian, Lijun; Qiu, Yong; Chen, Yajun; Xu, Bo
Source:
Polymer degradation and stability 2020 v.172 pp. 109063
ISSN:
0141-3910
Subject:
impact strength,   etc   ; biobased products; combustion; epoxides; flame retardants; gases; glass transition temperature; heat;     Show all 8 Subjects
Abstract:
... A phosphaphenanthrene flame retardant, DCAD, was synthesized by 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), p-phenylenediamine and bio-based material cinnamaldehyde. After being incorporated into epoxy thermosets, DCAD can impose better flame retardancy and physical-mechanical properties to epoxy thermosets. 4%DCAD/EP achieved a LOI value of 35.6% and passed the UL94 V-0 rating, obv ...
DOI:
10.1016/j.polymdegradstab.2019.109063

10. Toward Fully Bio-based and Supertough PLA Blends via in Situ Formation of Cross-Linked Biopolyamide Continuity Network

Author:
Liu, Hongzhi; Chen, Ning; Shan, Pengjia; Song, Pingan; Liu, Xuying; Chen, Jinzhou
Source:
Macromolecules 2019 v.52 no.21 pp. 8415-8429
ISSN:
1520-5835
Subject:
impact strength,   etc   ; composite polymers; crosslinking; crystallization; lysine;     Show all 5 Subjects
Abstract:
... Dynamic vulcanization has been demonstrated to be a versatile and efficient way of improving impact toughness of PLA. However, the existing vulcanization routes usually suffer from complicated presynthetic procedures and use of nonrenewable modifiers as well as markedly enhanced melt-viscosity. Herein, using both biomass-derived hydrogenated dimer acid (HDA) and an excess molar amount of l-lysine ...
DOI:
10.1021/acs.macromol.9b01398

11. Influence of friction spun yarn and thermally bonded roving structures on the mechanical properties of Flax/Polypropylene composites

Author:
Bar, Mahadev; Alagirusamy, R.; Das, Apurba
Source:
Industrial crops and products 2019 v.135 pp. 81-90
ISSN:
0926-6690
Subject:
impact strength,   etc   ; flax; friction; polypropylenes; spinning; yarns;     Show all 6 Subjects
Abstract:
... The main objective of this work is to study the effect of composite architecture on the mechanical properties of flax reinforced polypropylene (PP) composites. In this context, two different hybrid yarn structures using flax and polypropylene (PP) fibres have been produced; one, through the friction spinning method and the other through thermal bonding of blended roving. The friction spun yarn (FS ...
DOI:
10.1016/j.indcrop.2019.04.025

12. Effect of ply thickness and ply level hybridization on the compression after impact strength of thin laminates

Author:
Sasikumar, A.; Trias, D.; Costa, J.; Blanco, N.; Orr, J.; Linde, P.
Source:
Composites 2019 v.121 pp. 232-243
ISSN:
1359-835X
Subject:
impact strength,   etc   ; aircraft; composite materials; impact load;     Show all 4 Subjects
Abstract:
... There is a lack of research available on how thin laminates respond to impact and post impact loads, even though thin structures are used in present-day aircrafts. This experimental paper employs thick, standard and thin uni-directional plies to investigate the effect ply thickness has on thin laminates on their impact and compression after impact (CAI) response. Further, we propose two hybrid lam ...
DOI:
10.1016/j.compositesa.2019.03.022

13. Novel derivatives of 3D woven T-shaped composites with improved performance

Author:
Ali, Mumtaz; Kausar, Faizan; Shahid, Salma; Zeeshan, Muhammad; Nawab, Yasir; Riaz, Rabia; Memon, Anam Ali; Mengal, Naveed; Anjum, Aima Sameen
Source:
The journal of the Textile Institute 2019 v.110 no.2 pp. 267-273
ISSN:
1754-2340
Subject:
impact strength,   etc   ; composite polymers; fabrics; weaving; yarns;     Show all 5 Subjects
Abstract:
... Conventional 3D woven T-shaped preforms were modified for improving joint/ peel off strength of associated T-shaped polymeric composites. Preforms were modified at weaving level by preferred yarns orientations for better performance in associated composites. Major modifications studied are; the addition of supporting layer, single or double-crossing in joint layers and crossing along with supporti ...
DOI:
10.1080/00405000.2018.1480914

14. Use of agriculture waste as short discrete fibers and glass-fiber-reinforced-polymer rebars in concrete walls for enhancing impact resistance

Author:
Ahmed, Shehryar; Ali, Majid
Source:
Journal of cleaner production 2020 v.268 pp. 122211
ISSN:
0959-6526
Subject:
impact strength,   etc   ; absorption; agricultural wastes; cement; concrete; construction industry; developing countries; energy; equations; jute; manufacturing; prototypes; research programs; sand; steel;     Show all 15 Subjects
Abstract:
... Residual wastes of large-scale productions are constantly gaining attention in developing countries for their possible use in manufacturing of sustainable materials. Natural fibers (jute fibers) that are abundantly available in agriculturally progressive countries when used in concrete can engage construction industry for adopting environmentally friendly material composites. Jute fibers have tend ...
DOI:
10.1016/j.jclepro.2020.122211

15. Controllable synthesis of hierarchical nanostructured anhydrous MgCO3 and its effect on mechanical and thermal properties of PVC composites

Author:
Lu, Yunhua; Zhao, Chunyan; Khanal, Santosh; Xu, Shiai
Source:
Composites 2020 v.135 pp. 105926
ISSN:
1359-835X
Subject:
impact strength,   etc   ; Hydrangea; ascorbic acid; carbon dioxide; composite materials; hydrothermal carbonization; magnesium carbonate; poly(vinyl chloride); temperature; thermal stability;     Show all 10 Subjects
Abstract:
... Anhydrous MgCO₃ is a new attractive inorganic filler due to its many excellent properties. However, MgCO₃ particles are currently commercially unavailable because of their harsh synthesis conditions. In this study, a novel and efficient hydrothermal carbonization method was developed for synthesizing MgCO₃ using ascorbic acid (ASA) as both CO₂ source and crystal modifier. Hierarchical nanostructur ...
DOI:
10.1016/j.compositesa.2020.105926

16. Highly expanded fine-cell foam of polylactide/polyhydroxyalkanoate/nano-fibrillated polytetrafluoroethylene composites blown with mold-opening injection molding

Author:
Lee, Richard E.; Azdast, Taher; Wang, Guilong; Wang, Xiaodong; Lee, Patrick C.; Park, Chul B.
Source:
International journal of biological macromolecules 2020 v.155 pp. 286-292
ISSN:
0141-8130
Subject:
impact strength,   etc   ; biodegradability; cell structures; economic sustainability; foaming; foams; injection molding; manufacturing; melting; nitrogen; polyhydroxyalkanoates; polylactic acid; polytetrafluoroethylene; recipes;     Show all 14 Subjects
Abstract:
... To manufacture entirely biodegradable polylactic acid (PLA) foam with a high expansion ratio and a fine-cell structure, we attempted to design economically viable material recipe as well as the injection foam molding (FIM) process. It is well-known that PLA foam featuring high expansion and fine cells is challenging to achieve on FIM technique due to its intrinsically low melt strength. To overcom ...
DOI:
10.1016/j.ijbiomac.2020.03.212

17. Reprocessing of High-Density Polyethylene Reinforced with Carbon Nanotubes

Author:
Svensson, Sofie; Åkesson, Dan; Bohlén, Martin
Source:
Journal of polymers and the environment 2020 v.28 no.7 pp. 1967-1973
ISSN:
1566-2543
Subject:
impact strength,   etc   ; Fourier transform infrared spectroscopy; carbon nanotubes; chromatography; differential scanning calorimetry; extrusion; nanocomposites; oxidation; polyethylene; recycling; transmission electron microscopy;     Show all 11 Subjects
Abstract:
... High-density polyethylene (HDPE) was compounded with 3 wt% carbon nanotubes (CNTs). In order to simulate mechanical recycling, both the nanocomposite and neat HDPE were repeatedly extruded and subsequently analysed by tensile tests, Charpy impact strength, differential scanning calorimetry (DSC), oxidation induction time (OIT), Gel Performance Chromatography (GPC), Fourier Transform Infrared Spect ...
DOI:
10.1007/s10924-020-01739-2

18. Highly enhanced performance of epoxy composites via novel phthalazinone-bearing hybrid system as matrix

Author:
Zhang, Fengfeng; Zong, Lishuai; Weng, Zhihuan; Bao, Feng; Li, Nan; Wang, Jinyan; Jian, Xigao
Source:
Composites 2020 v.131 pp. 105772
ISSN:
1359-835X
Subject:
impact strength,   etc   ; carbon fibers; composite materials; epoxides; glass transition temperature; heat tolerance; modulus of rupture; storage modulus; tensile strength; wettability;     Show all 10 Subjects
Abstract:
... A novel phthalazinone-bearing epoxy resin, namely TEPZ, was designed and synthesized as functional modifier and prepreg agent for carbon fiber TGDDM epoxy composites by a “one pot two steps” method. Three-dimensional TEPZ/TGDDM/DDS system was constructed and optimized by modulating curing procedure and concentration of DDS to give thermosets with excellent thermal resistance and mechanical strengt ...
DOI:
10.1016/j.compositesa.2020.105772

19. Improving the Compatibility and Mechanical Properties of Natural Fibers/Green Polyethylene Biocomposites Produced by Rotational Molding

Author:
Robledo-Ortíz, Jorge R.; González-López, Martín E.; Rodrigue, Denis; Gutiérrez-Ruiz, Juan F.; Prezas-Lara, Fernando; Pérez-Fonseca, Aida A.
Source:
Journal of polymers and the environment 2020 v.28 no.3 pp. 1040-1049
ISSN:
1566-2543
Subject:
impact strength,   etc   ; biocomposites; coir; modulus of rupture; packaging; packaging materials; petroleum; polyethylene; rotational molding; tensile strength; water uptake;     Show all 11 Subjects
Abstract:
... In this work, sustainable rotomolded composites based on green polyethylene (Green-PE) and natural fibers (coir and agave) were studied. Fibers’ surface was treated with maleated polyethylene to improve the fiber-matrix compatibility. Samples were characterized by morphology, mechanical properties (impact, tension, and flexion) and water absorption. Results showed a more homogeneous morphology wit ...
DOI:
10.1007/s10924-020-01667-1

20. Tailoring the toughness of sustainable polymer blends from biodegradable plastics via morphology transition observed by atomic force microscopy

Author:
Wu, Feng; Misra, Manjusri; Mohanty, Amar K.
Source:
Polymer degradation and stability 2020 v.173 pp. 109066
ISSN:
0141-3910
Subject:
impact strength,   etc   ; atomic force microscopy; biodegradability; droplets; extrusion; industrial applications; melting; plastics; polybutylene succinate; polylactic acid; prediction; thermodynamics; viscosity;     Show all 13 Subjects
Abstract:
... Super-toughened polylactide/polybutylene succinate/polybutylene adipate terephthalate (PLA/PBS/PBAT) ternary blends can be prepared by reactive extrusion in the presence of peroxide. However, the high peroxide contents always lead to lowered biodegradability and decreased flowability of the prepared materials. In this study, a strategy to prepare such super-toughened PLA ternary blends with a smal ...
DOI:
10.1016/j.polymdegradstab.2019.109066