Stress relaxation behavior of organically modified montmorillonite filled natural rubber/nitrile rubber nanocomposites

To reduce material consumption, it is important to have reinforced material with longer life time. Incorporation of nanoparticles to reinforce and compatibilize polymer blends is one of the widely undergoing research areas in polymer science technology. A series of natural rubber and nitrile rubber...

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Published in:Applied Clay Science
Main Author: Maria H.J.; Lyczko N.; Nzihou A.; Joseph K.; Mathew C.; Thomas S.
Format: Article
Language:English
Published: 2014
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84891146694&doi=10.1016%2fj.clay.2013.10.019&partnerID=40&md5=844f51f84ac53931101a1c08d06cbc77
id 2-s2.0-84891146694
spelling 2-s2.0-84891146694
Maria H.J.; Lyczko N.; Nzihou A.; Joseph K.; Mathew C.; Thomas S.
Stress relaxation behavior of organically modified montmorillonite filled natural rubber/nitrile rubber nanocomposites
2014
Applied Clay Science
87

10.1016/j.clay.2013.10.019
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84891146694&doi=10.1016%2fj.clay.2013.10.019&partnerID=40&md5=844f51f84ac53931101a1c08d06cbc77
To reduce material consumption, it is important to have reinforced material with longer life time. Incorporation of nanoparticles to reinforce and compatibilize polymer blends is one of the widely undergoing research areas in polymer science technology. A series of natural rubber and nitrile rubber (NR/NBR) nanocomposite vulcanazite, reinforced with two different organically modified clay (OMt) were prepared. To predict the performance of a material over long periods of time, stress relaxation studies with both the reinforced systems were done. The effects of loading, blend composition, filler polarity and temperature on stress relaxation of OMt reinforced NR/NBR nanocomposites were carefully measured. Based on the stress relaxation measurements, it was observed that due to its polarity difference, O1Mt (Mt modified with dimethyl, benzyl, HT modification provided by Southern Clay Products) was preferentially located at the NBR phase while O2Mt (Mt modified with mercapto silane provided by English India Clay) had more affinity with natural rubber in the NR/NBR nanocomposites. The preferential localization of OMt has been analyzed by HRTEM. The nature of interaction of the nanoclay was found to influence the stress relaxation rate. NR/NBR nanocomposites with higher filler loading showed higher rates of relaxation rate due to the presence of more filler-filler interactions. At 70. °C, the viscosity ratio was found to influence the reinforcement, and consequently relaxation rate of the 50/50 NR/NBR nanocomposites. It was found that the rearrangements of the polymer chains are dependent on the blend composition, temperature, filler/polymer interactions etc. To explain and predict observed phenomena, the stretched-exponential Kohlrausch equation and Maxwell-Weichert model were used. For both models, the experimental curve fitted well with the theoretical models. © 2013 Elsevier B.V.

1691317
English
Article
All Open Access; Green Open Access
author Maria H.J.; Lyczko N.; Nzihou A.; Joseph K.; Mathew C.; Thomas S.
spellingShingle Maria H.J.; Lyczko N.; Nzihou A.; Joseph K.; Mathew C.; Thomas S.
Stress relaxation behavior of organically modified montmorillonite filled natural rubber/nitrile rubber nanocomposites
author_facet Maria H.J.; Lyczko N.; Nzihou A.; Joseph K.; Mathew C.; Thomas S.
author_sort Maria H.J.; Lyczko N.; Nzihou A.; Joseph K.; Mathew C.; Thomas S.
title Stress relaxation behavior of organically modified montmorillonite filled natural rubber/nitrile rubber nanocomposites
title_short Stress relaxation behavior of organically modified montmorillonite filled natural rubber/nitrile rubber nanocomposites
title_full Stress relaxation behavior of organically modified montmorillonite filled natural rubber/nitrile rubber nanocomposites
title_fullStr Stress relaxation behavior of organically modified montmorillonite filled natural rubber/nitrile rubber nanocomposites
title_full_unstemmed Stress relaxation behavior of organically modified montmorillonite filled natural rubber/nitrile rubber nanocomposites
title_sort Stress relaxation behavior of organically modified montmorillonite filled natural rubber/nitrile rubber nanocomposites
publishDate 2014
container_title Applied Clay Science
container_volume 87
container_issue
doi_str_mv 10.1016/j.clay.2013.10.019
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-84891146694&doi=10.1016%2fj.clay.2013.10.019&partnerID=40&md5=844f51f84ac53931101a1c08d06cbc77
description To reduce material consumption, it is important to have reinforced material with longer life time. Incorporation of nanoparticles to reinforce and compatibilize polymer blends is one of the widely undergoing research areas in polymer science technology. A series of natural rubber and nitrile rubber (NR/NBR) nanocomposite vulcanazite, reinforced with two different organically modified clay (OMt) were prepared. To predict the performance of a material over long periods of time, stress relaxation studies with both the reinforced systems were done. The effects of loading, blend composition, filler polarity and temperature on stress relaxation of OMt reinforced NR/NBR nanocomposites were carefully measured. Based on the stress relaxation measurements, it was observed that due to its polarity difference, O1Mt (Mt modified with dimethyl, benzyl, HT modification provided by Southern Clay Products) was preferentially located at the NBR phase while O2Mt (Mt modified with mercapto silane provided by English India Clay) had more affinity with natural rubber in the NR/NBR nanocomposites. The preferential localization of OMt has been analyzed by HRTEM. The nature of interaction of the nanoclay was found to influence the stress relaxation rate. NR/NBR nanocomposites with higher filler loading showed higher rates of relaxation rate due to the presence of more filler-filler interactions. At 70. °C, the viscosity ratio was found to influence the reinforcement, and consequently relaxation rate of the 50/50 NR/NBR nanocomposites. It was found that the rearrangements of the polymer chains are dependent on the blend composition, temperature, filler/polymer interactions etc. To explain and predict observed phenomena, the stretched-exponential Kohlrausch equation and Maxwell-Weichert model were used. For both models, the experimental curve fitted well with the theoretical models. © 2013 Elsevier B.V.
publisher
issn 1691317
language English
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accesstype All Open Access; Green Open Access
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