Influence of Polymer Elasticity on the Formation of Non-Cracking Honeycomb Films

2012 ◽  
Vol 24 (31) ◽  
pp. 4327-4330 ◽  
Author(s):  
Zhou Zhang ◽  
Timothy C. Hughes ◽  
Paul A. Gurr ◽  
Anton Blencowe ◽  
Xiaojuan Hao ◽  
...  
Keyword(s):  
Polymer Elasticity

scholarly journals Prolonged Thermal Relaxation of the Thermosetting Polymers

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4104
Author(s):  
Alexander Korolev ◽  
Maxim Mishnev ◽  
Nikolai Ivanovich Vatin ◽  
Anastasia Ignatova
Keyword(s):  
Elevated Temperatures ◽  
Thermal Relaxation ◽  
Polymer Structure ◽  
Polymer Materials ◽  
Prolonged Heating ◽  
High Entropy ◽  
Thermosetting Polymers ◽  
Entropy Parameter ◽  
Entropy Factor ◽  
Polymer Elasticity

The rigidity of structures made of polymer composite materials, operated at elevated temperatures, is mainly determined by the residual rigidity of the polymer binder (which is very sensitive to elevated temperatures); therefore, the study of ways to increase the rigidity of polymer materials under heating (including prolonged heating) is relevant. In the previous research, cured thermosetting polymer structure’s non-stability, especially under heating, is determined by its supra-molecular structure domain’s conglomerate character and the high entropy of such structures. The polymer elasticity modeling proved the significance of the entropy factor and layer (EPL) model application. The prolonged heating makes it possible to release adsorptive inter-layer bonds and volatile groups. As a result, the polymer structure is changing, and inner stress relaxation occurs due to this thermo-process, called thermo-relaxation. The present study suggests researching thermo-relaxation’s influence on polymers’ deformability under load and heating. The research results prove the significant polymer structure modification due to thermo-relaxation, with the polymer entropy parameter decreasing, the glassing onset temperature point (Tg) increasing by 1.3–1.7 times, and the modulus of elasticity under heating increasing by 1.5–2 times.

Polymer Elasticity Nature in the Transition Zone

1980 ◽  
Vol 8 (2-3) ◽  
pp. 85-98 ◽  
Author(s):  
L. S. Priss ◽  
I. I. Vishnyakov ◽  
I. P. Pavlova
Keyword(s):  
Transition Zone ◽  
Polymer Elasticity

Stretched, Twisted, Supercoiled and Braided DNA

1996 ◽  
Vol 463 ◽  
Author(s):  
John F. Marko
Keyword(s):  
Single Molecule ◽  
Double Helix ◽  
Persistence Length ◽  
Thermal Fluctuations ◽  
Internal Dynamics ◽  
Flexible Polymer ◽  
Bending Elasticity ◽  
Polymer Elasticity ◽  
Dna Double Helix ◽  
Semi Flexible Polymer

ABSTRACTThe DNA double helix is a semi-flexible polymer with twist rigidity. Its bending elasticity gives rise to entropie polymer elasticity, which can be precisely studied in single-molecule experiments. DNA's twist rigidity causes it to wrap around itself, or ‘supercoil’, when it is sufficiently twisted; thermal fluctuations destabilize supercoiling for DNAs twisted fewer than once per twist persistence length. Twisted DNAs under tension, braided DNAs, and the internal dynamics of supercoiled DNAs are discussed. The interplay between braiding and supercoiling free energy is argued to be important for the decatenation of duplicated DNAs in prokaryote cells.

Polymer Elasticity & Collapse

2010 ◽  
pp. 659-684
Author(s):  
Ken A. Dill ◽  
Sarina Bromberg ◽  
Dirk Stigter
Keyword(s):  
Polymer Elasticity

Polymer Elasticity Analysis with Atomic Force Acoustic Microscopy

2004 ◽  
pp. 729-733 ◽  
Author(s):  
A. E. Efimov ◽  
S. A. Saunin ◽  
N. A. Mescheryakov
Keyword(s):  
Acoustic Microscopy ◽  
Elasticity Analysis ◽  
Atomic Force ◽  
Polymer Elasticity

Influence of bond angle restrictions on polymer elasticity

1959 ◽  
Vol 34 (127) ◽  
pp. 337-347 ◽  
Author(s):  
P. J. Flory ◽  
C. A. J. Hoeve ◽  
A. Ciferri
Keyword(s):  
Bond Angle ◽  
Polymer Elasticity
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