Polymerization of styrene oxide catalyzed by a diethylzinc/α-pinene oxide system

✍ Scribed by Yubin Huang; Lianxun Gao; Mengxian Ding

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 134 KB
• Volume: 37
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19991215)37:24<4640::aid-pola22>3.0.co;2-4

✦ Synopsis

Styrene oxide (SO) was polymerized with a diethylzinc/␣-pinene oxide (ZnEt 2 /␣-PiO) catalyst system under various conditions. Polystyrene oxide (PSO) thus obtained had a regular head-to-tail and isotactic structure. The number-average molecular weight reached 4.07 ϫ 10 4 , and the molecular weight distribution was 5.7 (M w /M n ). The glass-transition temperature of PSO was about 47 to 50 °C, depending on the molecular weight. The molar ratio of ZnEt 2 to ␣-PiO, 2 : 1, led to a high molecular weight of PSO in an 89.2% yield within 72 h.