Supramolecular structure, phase behavior and thermo-rheological properties of a poly ( l -lactide-co-ε-caprolactone) statistical copolymer

2015 ◽  
Vol 48 ◽  
pp. 153-163 ◽  
Author(s):  
Jone M. Ugartemendia ◽  
M.E. Muñoz ◽  
A. Santamaria ◽  
J.R. Sarasua
Keyword(s):  
Phase Behavior ◽  
Rheological Properties ◽  
Supramolecular Structure ◽  
Structure Phase ◽  
Statistical Copolymer

Mechanical and Structural Consequences of Associative Dynamic Cross-Linking in Acrylic Diblock Copolymers

2019 ◽  
Author(s):  
Jacob Ishibashi ◽  
Yan Fang ◽  
Julia Kalow
Keyword(s):  
Block Copolymers ◽  
Rheological Properties ◽  
Diblock Copolymers ◽  
Cross Linking ◽  
Statistical Copolymer

<p>Block copolymers are used to construct covalent adaptable networks that employ associative exchange chemistry (vitrimers). The resulting vitrimers display markedly different nanostructural, thermal and rheological properties relative to those of their statistical copolymer-derived counterparts. This study demonstrates that prepolymer sequence is a versatile strategy to modify the properties of vitrimers.</p>

Rheological properties and phase behavior of a hydroxypropyl cellulose-poly(ethylene glycol) system

2010 ◽  
Vol 52 (2) ◽  
pp. 144-149 ◽  
Author(s):  
M. Yu. Tolstykh ◽  
V. V. Makarova ◽  
A. V. Semakov ◽  
V. G. Kulichikhin
Keyword(s):  
Ethylene Glycol ◽  
Phase Behavior ◽  
Rheological Properties ◽  
Hydroxypropyl Cellulose ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Phase behavior, supramolecular structure, and molecular conformation of lipopolysaccharide

Immunobiology ◽  
1993 ◽  
Vol 187 (3-5) ◽  
pp. 191-211 ◽  
Author(s):  
Ulrich Seydel ◽  
Harald Labischinski ◽  
Manfred Kastowsky ◽  
Klaus Brandenburg
Keyword(s):  
Phase Behavior ◽  
Supramolecular Structure ◽  
Molecular Conformation

Correlation of Vulcanization and Viscoelastic Properties of Nanocomposites Based on Natural Rubber and Different Nanofillers, with Molecular and Supramolecular Structure

2010 ◽  
Vol 83 (1) ◽  
pp. 16-34 ◽  
Author(s):  
Mithun Bhattacharya ◽  
Anil K. Bhowmick
Keyword(s):  
Natural Rubber ◽  
Rheological Properties ◽  
Supramolecular Structure ◽  
Carbon Nanofiber ◽  
Volume Fraction ◽  
Barrier Properties ◽  
Qualitative Description ◽  
Viscoelastic Parameters ◽  
Low Volume ◽  
And Performance

Abstract Elastomer nanocomposites reinforced with low volume fraction of nanofillers, such as nanoclays and carbon nanofibers, have long been known to possess significantly improved mechanical, thermal, dynamic mechanical, flame retardant, and barrier properties. The present work attempts to evaluate the effect of nanofillers (like modified and unmodified montmorillonite, sepiolite, carbon nanofiber, and carbon black) and their amount on vulcanization, as well as dynamic and rheological properties in the prevulcanization and postvulcanization stages. Upon using organomodified nanoclay, optimum cure time was reduced and cure rate index increased; whereas, in comparison, carbon nanofiber resulted in a slower cure. The influence of loading of some representative nanofillers on natural rubber was studied through qualitative description of critical dynamic viscoelastic parameters, which indicated the formation of supramolecular structure even at low volume fraction. The nanocomposite vulcanizates showed solidlike rheological behavior and upon implementation of dispersion techniques the activation energy of flow was reduced by around 60%. The knowledge of cure and rheological properties of the compounds, which evolves from the structure formation, can be utilized for assessing process optimization, cost reduction, and performance of the nanocomposites.

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