Styrene/butadiene copolymer synthesized by reactive extrusion

Autor:	Sheng-jie Tang, Dong Shan, Jiming Wang, Bo Chen, Anna Zheng
Rok vydání:	2015
Předmět:	Styrene-butadiene Materials science Polymers and Plastics Bulk polymerization General Chemical Engineering Organic Chemistry Solution polymerization Reactive extrusion chemistry.chemical_compound Anionic addition polymerization Polybutadiene chemistry Polymerization Polymer chemistry Copolymer
Zdroj:	Chinese Journal of Polymer Science. 33:1096-1103
ISSN:	1439-6203 0256-7679
DOI:	10.1007/s10118-015-1659-2
Popis:	In this study, we present a method to synthesize styrene-butadiene copolymer, using anionic polymerization in a co-rotating closely intermeshing twin-screw extruder. The weight content of polybutadiene in these copolymers was above 50% although in the past studies it had been possible to accomplish levels higher than 30%. 1H-NMR and GPC show that the molecular structure of the two polymers is different due to different feeding method. In terms of the structure of the polymerized products, the mechanism of polymerization in the bulk polymerization is discussed. TEM and DMA show that two phases in the block copolymer are completely incompatible, leading to sharp phase separation, while the case is complicated in the copolymer through the mixture feeding. Traditionally, styrene-butadiene rubber is mainly synthesized by solution polymerization. Reactive extrusion in this paper provides a possibility to synthesize these products in an environmentally friendly way.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::302cbb23ef0d6add73dee38da300b5fe https://doi.org/10.1007/s10118-015-1659-2 Zobrazit plný text záznamu Full text from SpringerLink