"One‐pot" random terpolymerization of styrene, isoprene and butadiene with Nd‐based catalyst. Issue 3 (6th May 2013)

• Record Type: Journal Article
• Authors: Li, Tingting; Hu, Yanming; Zhang, Hongxia; Shi, Zhenghai; He, Gongqiang; Wang, Yurong; Shen, Kaihua; Li, Yang
• Is Part Of: Journal of applied polymer science. Volume 130:Issue 3(2013:Nov. 05)
• Page Start: 1772
• Page End: 1777
• Publication Date: 2013-05-06
• Subjects: Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.39327
• Languages: English
• ISSNs: 0021-8995

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>Random styrene‐isoprene‐butadiene rubber (SIBR) were achieved with the catalyst system composed of neodymium isopropoxide (Nd(OⁱPr)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 (<italic>M_n</italic>) and narrow molecular weight distribution (<italic>M_w</italic>/<italic>M_n</italic>). 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 <italic>M_n</italic> of polymer than toluene as a solvent. The glass transition temperature (<italic>T_g</italic>) 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. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1772–1777, 2013</p> </abstract>