Morphologies of Polyisoprene-Grafted Silica Nanoparticles in Model Elastomers
Morphologies of Polyisoprene-Grafted Silica Nanoparticles in Model Elastomers
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模型弹性体中聚异戊二烯接枝二氧化硅纳米颗粒的形貌
DOI:
10.1021/acs.macromol.9b01479
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发表时间:
2019
期刊:
影响因子:
5.5
通讯作者:
Gigmes, Didier
中科院分区:
文献类型:
--
作者:
Bonnevide, Marine;Jimenez, Andrew M.;Dhara, Deboleena;Phan, Trang N.T.;Malicki, Nicolas;Abbas, Zaid M.;Benicewicz, Brian;Kumar, Sanat K.;Couty, Marc;Gigmes, Didier
We control nanoparticle (NP) dispersion by leveraging the entropic and enthalpic effects associated with mixing silica NPs grafted with polyisoprene (PI) chains into matrices of varying degrees of chemical dissimilarity. Previous work in this area has primarily focused on entropic factors alone, and hence, this work represents a significant advance over the current state-of-the-art. We show using a combination of transmission electron microscopy/small-angle X-ray scattering that mixing grafted particles with PI matrices of identical microstructure yields dispersion states as found in the literature for such entropic systems. However, replacing the PI matrix chains with dissimilar matrices leads to an introduction of enthalpic interactions that, in some cases, can drastically change the resulting morphology. In particular, while slightly different PI microstructures for the grafted and free chains only yield moderated differences, using styrene–butadiene copolymers as a matrix leads to a completely different behavior. In the last case, phase separation becomes more likely with the increasing graft length, while the PI system (whose behavior is dominated by entropic factors) shows the opposite behavior. Tuning the relative importance of enthalpic versus entropic factors is thus another tool in controlling the self-assembled structure of NPs, which gives rise to enhanced macroscopic properties in the composite.
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影响因子:
14
作者:
S. Nazhat;S. Parker;P. D. Riggs;M. Braden
通讯作者:
M. Braden
DOI:
--
发表时间:
2013
期刊:
Tribology letter
影响因子:
--
作者:
C. Mary;D. Philippon;Lionel Lafarge;D. Laurent;Francis Rondelez;S. Bair;Philippe Vergne
通讯作者:
Philippe Vergne
影响因子:
5.5
作者:
Zhang R;Lee B;Bockstaller MR;Douglas JF;Stafford CM;Kumar SK;Raghavan D;Karim A
通讯作者:
Karim A
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
A. Almeida;Ana Paula Lelis Rodrigues de Oliveira;Cynthia D’Avila Carvalho Erbetta;R. Sousa;R. Freitas;Maria Elisa Scarpelli Ribeiro e Silva
通讯作者:
Maria Elisa Scarpelli Ribeiro e Silva
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
エル.マキニス エドウィン;アラン サンダスキー ドナルド
通讯作者:
アラン サンダスキー ドナルド