Microstructure and Glass-Transition Temperature of Novel Sn-SIBR

Yi Bing Xu; Guo Zhu Yu; Lin Xu; Chuan Qing Li

doi:10.4028/www.scientific.net/AMM.152-154.226

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 152-154Microstructure and Glass-Transition Temperature of...

Microstructure and Glass-Transition Temperature of Novel Sn-SIBR

Abstract:

A novel Tin-functionalized integrated rubber of styrene-isoprene-butadiene (St-Ip-Bd) tri-copolymer (Sn-SIBR) was prepared by anionic polymerization using self-made tin-containing organolithium (SnLi) as initiator, tetrahydrofuran (THF) as polar modifier, and cyclohexane as solvent. The microstructure and the glass-transition temperature (Tg) of tri-copolymers were characterized by 1H NMR and differential scanning calorimetry (DSC), respectively. The result shows that the non-1,4-structure content and the Tg of tri-copolymers increased with the increase of THF dosage and the initiator concentration or the decrease of polymerization temperature. We also obtained the relationships between the ln(T/Li)( THF/ SnLi, mole ratio) and the non-1,4-structure content, the non-1,4-structure content and the Tg of copolymers, respectively.

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Periodical:

Applied Mechanics and Materials (Volumes 152-154)

Pages:

226-231

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.152-154.226

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Online since:

January 2012

Authors:

Yi Bing Xu, Guo Zhu Yu, Lin Xu, Chuan Qing Li

Keywords:

Glass Transition Temperature, Structure, Tin-Containing Organolithium Initiator, Tin-Functionalized Integrated Rubber

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