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论文类型：期刊论文

发表时间：2013-11-05

发表刊物：JOURNAL OF APPLIED POLYMER SCIENCE

收录刊物：SCIE、EI、Scopus

卷号：130

期号：3

页面范围：1772-1777

ISSN号：0021-8995

关键字：terpolymerization; SIBR; Nd-based catalyst; random

摘要：Random styrene-isoprene-butadiene rubber (SIBR) were achieved with the catalyst system composed of neodymium isopropoxide (Nd((OPr)-Pr-i)(3)), methylaluminoxane (MAO) and indene. This catalyst proved to be highly effective in cyclohexane even at low [Al]/[Nd] ratio (ca. 50) to give styrene-rich terpolymer with high number-average molecular weight (M-n) and narrow molecular weight distribution (M-w/M-n). Indene was critical to improve the coordination of styrene. High temperature was beneficial to increase the yield. Aliphatic solvents (hexane and cyclohexane) achieved a higher M-n of polymer than toluene as a solvent. The glass transition temperature (T-g) and composition of SIBR can be controlled by tuning the feed ratio of monomers. All the products have been fully characterized by NMR spectroscopy, gel permeation chromatograph (GPC), and DSC. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1772-1777, 2013