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1. Unique Isodimorphism of Poly(decamethylene succinate-ran-decamethylene fumarate): Large Pseudoeutectic Region and Fantastic Crystallization/Melting Behavior

Author:
Ye, Hai-Mu; Wang, Jing; Wang, Cai-Shui; Li, Hong-Fang
Source:
Macromolecules 2019 v.52 no.4 pp. 1447-1457
ISSN:
1520-5835
Subject:
melting; melting point,   etc   ; crystallization; crystals; polyesters; thermal properties;     Show all 6 Subjects
Abstract:
... Poly(decamethylene succinate-ran-decamethylene fumarate)s (PDSFs) were synthesized, and their structure and crystallization behavior were systematically studied. All polyesters possess high crystallizability irrespective of composition and display the widest pseudoeutectic region that has been reported to date. Nevertheless, both melting point– and crystallization temperature–composition relations ...
DOI:
10.1021/acs.macromol.8b01848

2. Constraint Release Mechanisms for H-Polymers Moving in Linear Matrices of Varying Molar Masses

Author:
Lentzakis, Helen; Costanzo, Salvatore; Vlassopoulos, Dimitris; Colby, Ralph H.; Read, Daniel Jon; Lee, Hyojoon; Chang, Taihyun; van Ruymbeke, Evelyne
Source:
Macromolecules 2019 v.52 no.8 pp. 3010-3028
ISSN:
1520-5835
Subject:
melting,   etc   ; molecular weight; solvents; viscoelasticity;     Show all 4 Subjects
Abstract:
... We investigate the influence of the environment on the relaxation dynamics of well-defined H-polymers diluted in a matrix of linear chains. The molar mass of the linear chain matrix is systematically varied and the relaxation dynamics of the H-polymer is probed by means of linear viscoelastic measurements, with the aim to understand its altered motion in different blends, compared to its pure melt ...
DOI:
10.1021/acs.macromol.9b00251

3. Mobility of Polymer-Tethered Nanoparticles in Unentangled Polymer Melts

Author:
Ge, Ting; Rubinstein, Michael
Source:
Macromolecules 2019 v.52 no.4 pp. 1536-1545
ISSN:
1520-5835
Subject:
melting,   etc   ; friction; hydrodynamics; nanoparticles; polymers;     Show all 5 Subjects
Abstract:
... A scaling theory is developed for the motion of a polymer-tethered nanoparticle (NP) in an unentangled polymer melt. We identify two types of scaling regimes depending on the NP diameter d and the size of a grafted polymer chain (tail) Rₜₐᵢₗ. In one type of regime, the tethered NP motion is dominated by the bare NP, as the friction coefficient of the tails is lower than that of the less mobile par ...
DOI:
10.1021/acs.macromol.8b02138

4. T–P–X Phase Diagram of the Water–Hydrogen System at Pressures up to 10 kbar

Author:
Kuzovnikov, M. A.; Tkacz, M.
Source:
Journal of physical chemistry 2019 v.123 no.6 pp. 3696-3702
ISSN:
1932-7455
Subject:
melting,   etc   ; hydrogen; liquids; temperature; thermodynamics;     Show all 5 Subjects
Abstract:
... The stability field of the C₀ hydrogen hydrate in the pressure–temperature phase diagram of the water–hydrogen system is studied by volumetry under hydrogen excess. This stability field is confined by the sII hydrate stability field at the low-pressure side; by the liquid stability field at the high-temperature side; and by the C₁ hydrate stability field at the high-pressure side. The pressure of ...
DOI:
10.1021/acs.jpcc.8b12083

5. Multiscale Simulations of Flows of a Well-Entangled Polymer Melt in a Contraction–Expansion Channel

Author:
Sato, Takeshi; Harada, Kohei; Taniguchi, Takashi
Source:
Macromolecules 2019 v.52 no.2 pp. 547-564
ISSN:
1520-5835
Subject:
melting,   etc   ; equations; hydrodynamics; models; polymers;     Show all 5 Subjects
Abstract:
... We have successfully applied a multiscale simulation (MSS) method [Murashima, T.; Taniguchi, T. Europhys. Lett. 2011, 96, 18002] to flows of a monodispersed linear entangled polymer melt in a contraction–expansion channel. In our MSS method, a macroscopic model is coupled with a microscopic model through the velocity gradient tensor and the stress tensor. The smoothed particle hydrodynamics (SPH) ...
DOI:
10.1021/acs.macromol.8b00649

6. Review of nonlinear oscillatory shear flow notations and presentations: polymeric liquids

Author:
Saengow, C.; Giacomin, A.J.
Source:
Current opinion in colloid & interface science 2019 v.43 pp. 26-38
ISSN:
1359-0294
Subject:
melting,   etc   ; plowing; polymers; shear stress; viscoelasticity; viscosity;     Show all 6 Subjects
Abstract:
... We review notations for, along with ways of presenting, the shear stress responses to large-amplitude oscillatory shear flow (LAOS). We find that the Fourier loss and storage viscosities to be the simplest primal notations for interpreting LAOS. The relative intensities provide the best evidence for oscillatory shear entering the large-amplitude regime. Deviation from linear viscoelastic behaviors ...
DOI:
10.1016/j.cocis.2019.02.003

7. A cloud-resolving simulation study of monthly-scale autumn precipitation on Hainan Island: The effects of three categories of Graupel on rainfall

Author:
Li, Jiangnan; Ye, Qingwen; Li, Fangzhou; Chen, Youlong
Source:
Atmospheric research 2019 v.220 pp. 92-108
ISSN:
0169-8095
Subject:
melting,   etc   ; autumn; evaporation; models; rain; snow; China;     Show all 7 Subjects
Abstract:
... Cloud-resolving CNTL experiments using WRF model effectively reproduce the month-scale characteristics of precipitation occurring on Hainan Island in the autumns of 2010 and 2011. The influences of low-density graupel (LDG) and high-density graupel (HDG) on autumn precipitation were modeled using the WDM6 microphysical scheme.The top three sources of rainwater in these simulations are: melting gra ...
DOI:
10.1016/j.atmosres.2019.01.008

8. Experimental study of paraffin melting in cylindrical cavity with central electric heating rod

Author:
Wang, Shuai; Guo, Yun; Peng, Changhong; Wang, Wanhong
Source:
Journal of environmental management 2019 v.237 pp. 264-271
ISSN:
0301-4797
Subject:
melting,   etc   ; convection; liquids; thermocouples; water temperature;     Show all 5 Subjects
Abstract:
... The experimental study for the melting processes of phase change material (paraffin) inside a cylindrical container under different boundary conditions of the cylindrical outside surface was carried out. In the experiments paraffin was heated by the heating rod installed in the center of the cylindrical container. The interpolation method was employed to calculate phase front and liquid fraction d ...
DOI:
10.1016/j.jenvman.2019.02.095

9. Systematic coarse‐graining of semicrystalline polyethylene

Author:
Li, Yiyang; Agrawal, Vipin; Oswald, Jay
Source:
Journal of polymer science 2019 v.57 no.6 pp. 331-342
ISSN:
0887-6266
Subject:
melting,   etc   ; deformation; glass transition; models; polyethylene;     Show all 5 Subjects
Abstract:
... In an effort to accelerate simulations exploring deformation mechanisms in semicrystalline polymers, we have created structure‐based coarse‐grained (CG) models of polyethylene and evaluated the extent to which they can simultaneously represent its amorphous and crystalline phases. Two CG models were calibrated from target data sampled from atomistic simulations of supercooled oligomer melts that d ...
DOI:
10.1002/polb.24789

10. Diluting Entangled Polymers Affects Transient Hardening but Not Their Steady Elongational Viscosity

Author:
Shahid, Taisir; Clasen, Christian; Oosterlinck, Filip; van Ruymbeke, Evelyne
Source:
Macromolecules 2019 v.52 no.6 pp. 2521-2530
ISSN:
1520-5835
Subject:
melting,   etc   ; friction; models; molecular weight; polystyrenes; viscosity;     Show all 6 Subjects
Abstract:
... It is now established that the huge qualitative difference in flow behavior between entangled polymer melts and solutions in nonlinear elongational flows cannot be explained in the framework of the “standard” tube model. Instead, the additional relaxation mechanism of alignment-induced friction reduction, acting primarily in melts, has shown its interesting potential to explain the experimental da ...
DOI:
10.1021/acs.macromol.8b02701

11. Semicrystalline physical hydrogels with shape-memory and self-healing properties

Author:
Okay, Oguz
Source:
Journal of materials chemistry B 2019 v.7 no.10 pp. 1581-1596
ISSN:
2050-7518
Subject:
melting point,   etc   ; crosslinking; hydrogels; hydrophilicity; hydrophobicity;     Show all 5 Subjects
Abstract:
... Synthetic hydrogels are generally amorphous in nature without any order at the molecular level. This is in contrast to biological gels containing ordered aggregates contributing significantly to their mechanical performance. Semicrystalline hydrogels, first developed in 1994, are moderately water-swollen hydrogels containing crystalline domains. Recent work shows that physically cross-linked semic ...
DOI:
10.1039/c8tb02767f

12. Accurate methodology to determine slip velocity, yield stress and the constitutive relation for molten chocolate

Author:
Talansier, Emeline; Bacconnier, Audrey; Caton, François; Chastel, Carine; Costa, Lucy; Gunes, Deniz Z.; Roux, Denis C.D.
Source:
Journal of food engineering 2019 v.244 pp. 220-227
ISSN:
0260-8774
Subject:
melting,   etc   ; chocolate; equipment; liquids; protocols; shear stress;     Show all 6 Subjects
Abstract:
... Concentrated soft materials like molten chocolate often has the ambiguity of behaving like a solid or a liquid depending on the external constraints. Determination of the constitutive relation is often unreliable and consequently the yield stress value too. This difficulty of determining yield stress, particularly when using a standards protocol such as the IOCCC for chocolate, is a consequence of ...
DOI:
10.1016/j.jfoodeng.2018.09.031

13. Determining the Dilution Exponent for Entangled 1,4-Polybutadienes Using Blends of Near-Monodisperse Star with Unentangled, Low Molecular Weight Linear Polymers

Author:
Hall, Ryan; Kang, Beom-Goo; Lee, Sanghoon; Chang, Taihyun; Venerus, David C.; Hadjichristidis, Nikos; Mays, Jimmy; Larson, Ronald G.
Source:
Macromolecules 2019 v.52 no.4 pp. 1757-1771
ISSN:
1520-5835
Subject:
melting,   etc   ; models; molecular weight; polymers; rheology;     Show all 5 Subjects
Abstract:
... We determine experimentally the “dilution exponent” α for entangled polymers from the scaling of terminal crossover frequency with entanglement density from the linear rheology of three 1,4-polybutadiene star polymers that are blended with low-molecular-weight, unentangled linear 1,4-polybutadiene at various star volume fractions, ϕₛ. Assuming that the rheology of monodisperse stars depends solely ...
DOI:
10.1021/acs.macromol.8b01828

14. Solution and Melts of Barbwire Bottlebrushes: Hierarchical Structure and Scale-Dependent Elasticity

Author:
Zhulina, Ekaterina B.; Sheiko, Sergei S.; Borisov, Oleg V.
Source:
Macromolecules 2019 v.52 no.4 pp. 1671-1684
ISSN:
1520-5835
Subject:
melting,   etc   ; guidelines; mechanical properties; polymers; prediction;     Show all 5 Subjects
Abstract:
... We present a scaling theory describing hierarchical structural organization of semidilute solutions and melts of ”barbwire” bottlebrushes. Such macromolecules consist of a long flexible main chain (backbone) and several side chains emanating from each branching point of a backbone in a starlike manner. We investigate local and large scale conformational properties as well as extensional elasticity ...
DOI:
10.1021/acs.macromol.8b02358

15. Study on the equivalent luminance of luminous fibers in mesopic vision

Author:
Yan, Yanhong; Gu, Bingfei; Du, Lei; Zhu, Yanan
Source:
The journal of the Textile Institute 2019 v.110 no.2 pp. 311-316
ISSN:
1754-2340
Subject:
melting,   etc   ; color; fabrics; pigments; polyamides; spinning; vision;     Show all 7 Subjects
Abstract:
... Luminous fiber is a kind of new functional material which is prepared by melt spinning process adding colored pigments and luminous material into polyamide fiber. Based on the experimental data of the emission spectra and the test luminance of the luminous fibers, the effect of emissive colors of luminous fibers on the equivalent luminance in mesopic vision is analyzed. The results show that the e ...
DOI:
10.1080/00405000.2018.1478701

16. How to recognise the traces left on a crime scene by a 3D-printed Liberator? Part 2. Elements of ammunition, marks on the weapons and polymer fragments

Author:
Honsberger, Hanna; Werner, Denis; Rhumorbarbe, Damien; Riva, Fabiano; Glardon, Matthieu; Gallusser, Alain; Delémont, Olivier
Source:
Forensic science international 2019 v.295 pp. 137-144
ISSN:
0379-0738
Subject:
melting,   etc   ; crime; forensic sciences; head; polymers;     Show all 5 Subjects
Abstract:
... The Liberator is a firearm that can be manufactured from its blueprints by the means of a 3D-printer. This handgun is composed of nineteen pieces: eighteen made of printed polymer and one metallic nail. This study focuses on the physical traces which can be found and exploited from a forensic point of view after the discharging of such types of pistols. Two main aspects have been investigated: (1) ...
DOI:
10.1016/j.forsciint.2018.12.010

17. Eutectic melt crystallization of L1₀-FePt

Author:
Zhang, Jingming; Li, Changning; Armstrong, Jason; Ren, Shenqiang
Source:
Chemical communications 2019 v.55 no.5 pp. 656-658
ISSN:
1364-548X
Subject:
melting,   etc   ; alloys; chemical reactions; crystallization; solvents;     Show all 5 Subjects
Abstract:
... Herein, we report the eutectic growth control of ordered L1₀-FePt, which directs the nucleation, growth and crystallization of FePt sheets in a single-step reaction. The nature of eutectic crystallization at the eutectic point suggests its role as a high-temperature solvent, exhibiting an advantage in the scale-up production of metastable alloys. ...
DOI:
10.1039/c8cc08199a

18. Nematic Coupling in Polybutadiene from MD Simulations

Author:
Shetty, Shreya; Gomez, Enrique D.; Milner, Scott T.
Source:
Macromolecules 2019 v.52 no.2 pp. 528-534
ISSN:
1520-5835
Subject:
melting,   etc   ; mathematical theory; molecular dynamics; polymers; temperature;     Show all 5 Subjects
Abstract:
... Classic experiments show that polybutadiene oligomers align in a network of stretched chains. Furthermore, the oligomers orient almost as strongly as the network, which suggests a large nematic coupling, despite polybutadiene being a flexible polymer. Here, we combine self-consistent field theory (SCFT) and atomistic molecular dynamics (MD) simulations of polymer chains under tension to obtain the ...
DOI:
10.1021/acs.macromol.8b02209

19. Dual defect system of tellurium antisites and silver interstitials in off-stoichiometric Bi₂(Te,Se)₃₊y causing enhanced thermoelectric performance

Author:
Kim, Cham; Lopez, David Humberto; Kim, Dong Hwan; Kim, Hoyoung
Source:
Journal of materials chemistry A 2019 v.7 no.2 pp. 791-800
ISSN:
2050-7496
Subject:
melting,   etc   ; glass; nanosilver; silver; tellurium; temperature;     Show all 6 Subjects
Abstract:
... Enhancement in the thermoelectric performance of n-type Bi₂(Te,Se)₃ was accomplished by forming a dual defect system composed of Te- and Ag-related defects. Te-rich Bi₂(Te,Se)₃₊y, which has antisite defects generated by an excess of Te, was prepared via a conventional melting process. We devised a one-pot process in which Ag nanoparticles were deposited onto the Te-rich Bi₂(Te,Se)₃₊y as soon as th ...
DOI:
10.1039/c8ta05261a

20. Diamond film growth by HFCVD on Q-carbon seeded substrate

Author:
Sachan, Ritesh; Bhaumik, Anagh; Pant, Punam; Prater, John; Narayan, Jagdish
Source:
Carbon 2019 v.141 pp. 182-189
ISSN:
0008-6223
Subject:
melting,   etc   ; carbon; coatings; seeds; tungsten; vapors;     Show all 6 Subjects
Abstract:
... While hot-filament assisted chemical vapor deposition (HFCVD) is a well-established technique to synthesize diamond thin films using microdiamond seeds, the quality of grown diamond thin films is often compromised due to the presence of contaminants, i.e. graphitic entities and the eroded tungsten filament remnants, at the film-substrate interface. Here, we present a novel approach to form high-qu ...
DOI:
10.1016/j.carbon.2018.09.058