Interfacial Interactions-Controlled Thermoelasticity and Stress Relaxation Behavior of Synthetic Rubber/Organoclay Nanocomposites

Autor:	F. Schön, Eleonora G. Privalko, S. M. Ponomarenko, Valery P. Privalko, Wolfram Gronski
Rok vydání:	2003
Předmět:	Nanocomposite Materials science Polymers and Plastics Strain (chemistry) Nanoparticle General Chemistry Calorimetry Amplification factor Condensed Matter Physics Natural rubber visual_art Materials Chemistry Stress relaxation visual_art.visual_art_medium Organoclay Composite material
Zdroj:	Journal of Macromolecular Science, Part B. 42:1183-1196
ISSN:	1525-609X 0022-2348
Popis:	Synthetic rubber/organoclay nanocomposites with weak (nonchemical) interfacial interactions (reference sample RS) and a sample of identical composition with strong (chemical) interfacial interactions (test sample TS) were characterized by x-ray scattering and stretching calorimetry techniques. Strain amplification proved to be a common mechanism of reinforcement of the rubber matrix by spatial aggregates of nanoparticles in both RS and TS samples. The breakdown of the initial infinite clusters of nanoparticles into small, isolated clusters at high extensions of the RS manifested itself as a strain dependence of the strain amplification factor concomitant to the generation of the large excess exothermal heat effects of external friction between nanoparticles. The strain-invariant strain amplification factor for the TS, combined with much smaller excess exothermal heat effects of external friction between nanoparticles, were regarded as evidence for the survival of the initial infinite clusters of ...
Databáze:	OpenAIRE
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