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1. 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

2. 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

3. 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

4. Effect of grafting generations of poly(amidoamine) dendrimer from the sisal fiber surface on the mechanical properties of composites

Author:
Sun, Zhanying; Yi, Fengqiang; Zhao, Xiongyan
Source:
Journal of natural fibers 2018 v.15 no.6 pp. 896-905
ISSN:
1544-046X
Subject:
impact strength,   etc   ; dendrimers; polypropylenes; sisal;     Show all 4 Subjects
Abstract:
... In order to improve the mechanical properties of sisal fiber-reinforced polypropylene composites, the sisal fibers were grafted with poly(amidoamine) dendrimer and the effects of grafting generations on the mechanical properties of composites were studied. The results reveal that the tensile, flexural, and impact strength of the composites are improved considerably with the poly(amidoamine) dendri ...
DOI:
10.1080/15440478.2017.1376304

5. Toughening of Cocontinuous Polylactide/Polyethylene Blends via an Interfacially Percolated Intermediate Phase

Author:
Zolali, Ali M.; Favis, Basil D.
Source:
Macromolecules 2018 v.51 no.10 pp. 3572-3581
ISSN:
1520-5835
Subject:
impact strength,   etc   ; polyethylene; polylactic acid;     Show all 3 Subjects
Abstract:
... It will be shown that an interfacially percolated rubbery phase in a cocontinuous polylactide (PLA)/linear low-density polyethylene (LLDPE) blend results in a significant increase in the impact strength. All blends possess a tricontinuous phase morphology in which poly(ε-caprolactone) (PCL), poly(ethylene–methyl acrylate) (EMA), and ethylene–methyl acrylate–glycidyl methacrylate (EMA-GMA) percolat ...
DOI:
10.1021/acs.macromol.8b00464

6. Processing a Supertoughened Polylactide Ternary Blend with High Heat Deflection Temperature by Melt Blending with a High Screw Rotation Speed

Author:
Deng, Liang; Xu, Cui; Ding, Shuangshuang; Fang, Huagao; Wang, Xuehui; Wang, Zhigang
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.24 pp. 10618-10628
ISSN:
1520-5045
Subject:
impact strength,   etc   ; biodegradability; heat; melting; mixing; polylactic acid; temperature;     Show all 7 Subjects
Abstract:
... A supertoughened ternary polylactide (PLA) blend with high heat deflection temperature was reported in this study. The ternary blend was composed of two major biocompatible and biodegradable polymers, namely, PLA and polyamide-11 (PA11), and one minor reactive elastomer, ethylene–acrylic ester–glycidyl methacrylate terpolymer (EGMA), as a toughener. Shear processing with a very high rotation speed ...
DOI:
10.1021/acs.iecr.9b01970

7. Investigation on the interfacial behaviour between the rubber-cement matrix of the rubberized concrete

Author:
Chen, Zhuoming; Li, Lijuan; Xiong, Zhe
Source:
Journal of cleaner production 2019 v.209 pp. 1354-1364
ISSN:
0959-6526
Subject:
impact strength,   etc   ; compression strength; concrete; latex; mixing; rubber;     Show all 6 Subjects
Abstract:
... Rubberized concrete is an innovative clean production material. In this study, the interfacial behaviour of the rubber-cement matrix (R-CM) of rubberized concrete was improved by selecting better rubber types, surface modifiers, mixing methods, supplementary cementing materials (SCMs), water-binder ratio (W/B ratio), and mixing time. The slump, apparent density, compressive strength, impact streng ...
DOI:
10.1016/j.jclepro.2018.10.305

8. Thermal and Mechanical Properties of Blends Containing PP and Recycled XLPE Cable Waste

Author:
Lindqvist, Karin; Andersson, Mattias; Boss, Annika; Oxfall, Henrik
Source:
Journal of polymers and the environment 2019 v.27 no.2 pp. 386-394
ISSN:
1566-2543
Subject:
impact strength,   etc   ; manufacturing; mixing; polypropylenes; recycling; thermal properties; wastes;     Show all 7 Subjects
Abstract:
... Recycled XLPE from cable manufacturing waste and end-of-life cables were mixed with virgin polypropylene (PP) in order to evaluate the potential to be used in new injection molded products. The influence of metal contaminations on the mechanical and thermal properties and how the blends could be stabilized in order to be recycled and give reliable properties over time were studied. The results sho ...
DOI:
10.1007/s10924-018-1357-6

9. Mechanical and ultimate properties of injection molded cellulose acetate/plasticizer materials

Author:
Charvet, Agathe; Vergelati, Caroll; Long, Didier R.
Source:
Carbohydrate polymers 2019 v.204 pp. 182-189
ISSN:
0144-8617
Subject:
impact strength,   etc   ; ambient temperature; cellulose acetate; diethyl phthalate; plasticizers; polymers;     Show all 6 Subjects
Abstract:
... The mechanical properties of injection molded plasticized cellulose acetate polymers processed with two different plasticizers (Triacetine and Diethyl phthalate) and various weight fractions comprised between 15 and 30 wt % have been investigated. Plasticized cellulose acetate exhibit a brittle-to-ductile transition from a low impact strength to a high impact strength of order 40 kJ/m². Obtaining ...
DOI:
10.1016/j.carbpol.2018.10.013

10. Ultratough Co-Continuous PLA/PA11 by Interfacially Percolated Poly(ether-b-amide)

Author:
Zolali, Ali M.; Heshmati, Vahid; Favis, Basil D.
Source:
Macromolecules 2017 v.50 no.1 pp. 264-274
ISSN:
1520-5835
Subject:
impact strength,   etc   ; adhesion; polymers;     Show all 3 Subjects
Abstract:
... It will be shown that when polyether-b-amide (PEBA) is added to a PLA/PA11 blend, it tends toward the interface and results in a significant increase in the impact strength when all three phases are fully percolated. The addition of the elastomeric PEBA phase to the binary PLA/PA11 blend replaces a rigid PLA/PA11 interface with a much more deformable one. The further addition of PEO to PLA results ...
DOI:
10.1021/acs.macromol.6b02310

11. An experimental investigation on mechanical and tribological properties of Himalayan nettle fiber composite

Author:
Pokhriyal, Mayank; Prasad, Lalta; Raturi, Himanshu Prasad
Source:
Journal of natural fibers 2018 v.15 no.5 pp. 752-761
ISSN:
1544-046X
Subject:
impact strength,   etc   ; hardness; polyesters; tensile strength;     Show all 4 Subjects
Abstract:
... The main focus of the present research work was to explore mechanical and tribological properties of Himalayan nettle fiber and unsaturated polyester resin (GP) using hand lay-up method. Four composite laminates were prepared by adding the Himalayan nettle fibers by weight percentage (5%–20%). The various properties (e.g., tensile strength, hardness, impact strength, and abrasion wear) were calcul ...
DOI:
10.1080/15440478.2017.1364202

12. Preparation and mechanism of shape memory bismaleimide resins with high transition temperature, high toughness and good processability

Author:
Chen, Banghui; Yuan, Li; Guan, Qingbao; Liang, Guozheng; Gu, Aijuan
Source:
Journal of materials science 2018 v.53 no.15 pp. 10798-10811
ISSN:
0022-2461
Subject:
impact strength,   etc   ; heat tolerance; resins; siloxanes; temperature;     Show all 5 Subjects
Abstract:
... Developing shape memory polymers (SMPs) with high transition temperature (Tₜᵣₐₙₛ), good toughness and good processability (low molding temperature and solvent-free) is still a great challenge. Herein, a new type of thermosetting shape memory resin (BDPH) is developed based on bismaleimide resin (BD), cardo-polyetherketone (PEK-C) and multi-maleimide-terminated branched polysiloxane (HSi). The effe ...
DOI:
10.1007/s10853-018-2367-4

13. Effect of interface on composites made from DREF spun hybrid yarn with low twisted core flax yarn

Author:
Bar, Mahadev; Das, Apurba; Alagirusamy, R.
Source:
Composites 2018 v.107 pp. 260-270
ISSN:
1359-835X
Subject:
impact strength,   etc   ; composite materials; flax; manufacturing; yarns;     Show all 5 Subjects
Abstract:
... In the present work, the influence of interface and hybrid yarn structure on flax-PP based unidirectional composite properties have been studied thoroughly. Flax-PP based core-sheath structured DREF spun hybrid yarns are manufactured after varying the core yarn twist and sheath percentage at three different levels and using MAgPP treated and untreated flax yarn as core. These hybrid yarns are cons ...
DOI:
10.1016/j.compositesa.2018.01.003

14. Understanding the effect of copolymer content on the processability and mechanical properties of polyhydroxyalkanoate (PHA)/wood composites

Author:
Chan, Clement Matthew; Vandi, Luigi-Jules; Pratt, Steven; Halley, Peter; Ma, Yiming; Chen, Guo-Qiang; Richardson, Desmond; Werker, Alan; Laycock, Bronwyn
Source:
Composites 2019 v.124 pp. 105437
ISSN:
1359-835X
Subject:
impact strength,   etc   ; brittleness; composite polymers; mixed culture; polyhydroxyalkanoates; tensile strength; wood; wood flour;     Show all 8 Subjects
Abstract:
... The present study investigates the effects of copolymer composition on the mechanical properties of extruded mixed culture poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3HB4HB) copolymers and their composites with 50 wt% wood flour. The use of copolymers with a higher strain at break (i.e. 24 mol% 3-HV and 15 mol% 4-HB copolymers) for compos ...
DOI:
10.1016/j.compositesa.2019.05.005

15. Effect of Talc on Mechanical Characteristics and Fracture Toughness of Poly(lactic acid)/Poly(butylene succinate) Blend

Author:
Pivsa-Art, Weraporn; Pivsa-Art, Sommai
Source:
Journal of polymers and the environment 2019 v.27 no.8 pp. 1821-1827
ISSN:
1566-2543
Subject:
impact strength,   etc   ; crystallization; modulus of elasticity; polybutylene succinate; polylactic acid; talc; tensile strength;     Show all 7 Subjects
Abstract:
... This research investigates the effect of talc additive on physical and mechanical characteristics of poly(lactic acid) (PLA) and poly(butylene succinate) (PBS) polymer blend. In the study, the talc content is varied between 0, 5, 10, and 20 parts per hundred resin (phr) and the PLA/PBS ratio is 80/20 w/w. The results reveal that talc enhances the mechanical properties of PLA/PBS blend. Specificall ...
DOI:
10.1007/s10924-019-01478-z

16. Improvements in the crystallinity and mechanical properties of PLA by nucleation and annealing

Author:
Simmons, Heather; Tiwary, Praphulla; Colwell, James E.; Kontopoulou, Marianna
Source:
Polymer degradation and stability 2019 v.166 pp. 248-257
ISSN:
0141-3910
Subject:
impact strength,   etc   ; annealing; crosslinking; crystal structure; extrusion; glass transition temperature; heat; hydrolysis; thermal degradation;     Show all 9 Subjects
Abstract:
... We develop strategies to improve the crystallinity and mechanical properties of PLA, without compromising its hydrolytic degradation behaviour. These include reactive extrusion, and addition of a novel type of cross-linked PLA-based nucleating agent (biofiller, BF). The crystallinity is further increased by annealing at temperatures between 80 and 120 °C. Maximum crystallinities of 55% were achiev ...
DOI:
10.1016/j.polymdegradstab.2019.06.001

17. Modification of illite with calcium pimelate and its influence on the crystallization and mechanical property of isotactic polypropylene

Author:
Song, Tiantian; Ren, Zhongjie; Li, Huihui; Sun, Xiaoli; Xue, Meiling; Yan, Shouke
Source:
Composites 2019 v.123 pp. 200-207
ISSN:
1359-835X
Subject:
impact strength,   etc   ; calcium; composite materials; crystal structure; crystallization; illite; mixing; polypropylenes; tensile strength;     Show all 9 Subjects
Abstract:
... A novel illite with β-nucleation ability toward iPP has been prepared through decoration the pristine illite with CaHA, i.e. CaHA-illite. The crystallization behavior and mechanical property of the iPP/CaHA-illite composite were studied. For comparison, the composites were also made simply by adding different components simultaneously into iPP matrix during mixing in a mini-extruder. The results s ...
DOI:
10.1016/j.compositesa.2019.05.018

18. Remarkably Improved Impact Fracture Toughness of Isotactic Polypropylene via Combining the Effects of Shear Layer-Spherulites Layer Alternated Structure and Thermal Annealing

Author:
Liu, Mingjin; Hong, Rui; Gu, Xuanbo; Fu, Qiang; Zhang, Jie
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.32 pp. 15069-15078
ISSN:
1520-5045
Subject:
impact strength,   etc   ; adhesion; annealing; microstructure; plastic deformation; polypropylenes; process design; temperature;     Show all 8 Subjects
Abstract:
... The effect of thermal annealing on the mechanical properties and microstructure of polymers has been studied intensively. Nevertheless, sparse work investigated the influence of annealing on the mechanical properties of materials with alternated structure. In this work, the evolution of properties and microstructure of iPP samples with different structure after annealing were discussed. Note that ...
DOI:
10.1021/acs.iecr.9b02858

19. A novel organic-inorganic hybrid K-HBPE@APP performing excellent flame retardancy and smoke suppression for polypropylene

Author:
Zhang, Naien; Zhang, Jie; Yan, Hong; Guo, Xiaorong; Sun, Qiang; Guo, Ruijie
Source:
Journal of hazardous materials 2019 v.373 pp. 856-865
ISSN:
0304-3894
Subject:
impact strength,   etc   ; crosslinking; flame retardants; flammability; heat; microencapsulation; polyesters; polypropylenes; silane; silicon; smoke; tensile strength;     Show all 12 Subjects
Abstract:
... To overcome the flammability and severe dripping of polypropylene (PP), a novel organic-inorganic hybrid K-HBPE@APP (microencapsulated APP by a hyperbranched polyester (HBPE) via silane coupling agent (KH-550)) was obtained and used as a high-efficient flame retardant and smoke suppressant. Herein, HBPE acted as the charring agent for APP. 20 wt% of K-HBPE@APP imparted PP excellent flame retardanc ...
DOI:
10.1016/j.jhazmat.2019.04.016

20. Impact of surface treatment on the mechanical properties of sisal and jute reinforced with epoxy resin natural fiber hybrid composites

Author:
Premnath, A. Arun
Source:
Journal of natural fibers 2019 v.16 no.5 pp. 718-728
ISSN:
1544-046X
Subject:
impact strength,   etc   ; engineering; epoxides; hardness; jute; modulus of rupture; scanning electron microscopes; sisal; tensile strength;     Show all 9 Subjects
Abstract:
... Natural fiber composites (NFCs) are gaining importance in various fields of engineering due to their ecofriendly nature and low cost. The present work is aimed in studying the mechanical properties such as tensile strength, flexural strength, impact strength, and hardness for natural fiber/epoxy resin composites reinforced with sisal and jute. The composites are prepared by hand lay-up method by v ...
DOI:
10.1080/15440478.2018.1432002