摘要
氢化聚苯乙烯－（乙烯丁烯无规共聚物）－聚苯乙烯三嵌段共聚物（ＳＥＢＳ）是一种性能优良的热塑性弹性体［１～３］．由于其结构明确，分子量均一，如果能引入含量可控的功能基团，在理论研究方面具有重要意义．ＳＥＢＳ的化学改性大多集中在ＰＳ段的磺化［４，５］及Ｅ...
Hydroxymethyl groups were introduced into hydrogenated poly(styrene block butadiene block styrene)(SEBS) via chemical modification of the PS blocks by a simple three step procedure, i.e. , chloromethylation via Friedel Crafts reaction with stannic chloride(SnCl 4) as catalyst in chloroform solution in the presence of trioxane and chlorotrimethylsilane, followed by esterification and hydrolysis by using phase transfer catalyst TBAB. 1H NMR, FTIR, SEC and elemental analysis were employed to characterize the products. The results show that the degree of functionalization could be controlled in the first step, and the convertions of chloromethyl to ester and ester to hydroxyl were complete. Meanwhile molecular weight distribution of the product was still narrow. Crosslinking could be avoided when the polymer concentration was kept lower than its overlap concentration.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第5期827-829,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
