摘要
使用化学共混法和机械共混法制备了三嵌段苯乙烯－丁二烯－苯乙烯共聚物（ＳＢＳ）／聚（苯乙烯－甲基丙烯酸盐）热塑性互穿聚合物网络（ＩＰＮ）．用透射电镜和动态力学方法研究了它们的形态和玻璃化转变行为．实验结果显示出，由母体形成ＩＰＮ提高了体系的相容性，且化学共混方法明显好于机械共混法．ＩＰＮ样品均呈微观相分离形态，具有两个分属于聚丁二烯相和聚（苯乙烯－甲基丙烯酸盐）相的玻璃化转变温度．通过Ｂｕｄｉａｎｓｋｙ方程和Ｋｅｒｎｅｒ方程对动态模量数据的分析表明，ＩＰＮ样品具有两相连续性，且随ＳＢＳ（聚合物Ⅰ）组分含量的增加。
hemically blended thermoplastic IPN(CBT-IPN) and mechanically blended thermoplastic IPN(MBT-IPN) were prepared by combining polymer Ⅰ, a linear styrene-butadiene-styrene(SBS) triblock copolymer with polymer Ⅱ, an ionomer prepared from a random copolymer of styrene and methacrylic acid(10: 1,by volume). Their morphology and glass transition behavior were investigated by transmission electron microscopy(TIM) and dynamic mechanical spectroscopy (DMS). The experimentel results showed that compatibility was increased after forming IPN from precursors and that CBT-IPN were more compatible than compositionally equivalent MBT-IPN. All of samples exhibited two glass transition temperature and two phases which separated from each other. Analysis of moduli data with the theories of Budiansky and Kerner disclosed dual phase continuity and phase continuity of polymer Ⅱ was decreased with increase of SBS content.
出处
《高分子学报》
CSCD
北大核心
1996年第3期271-277,共7页
Acta Polymerica Sinica
关键词
IPN
SBS
共聚物
苯乙烯
甲基丙烯酸盐
Thermoplastic interpenetrating polymer networks
Styrene-butadienes-tyrene triblock copolymer
Styrene-methacrylate ionomer
