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用线膨胀仪和动态粘弹谱仪测定了具有不同分子量和不同支化度的规则星形苯乙烯-异戊二烯嵌段共聚物的玻璃化转变温度。Tg(s)和Tg(I)值均依赖于共聚物的形态结构、支化度和分子量。其中分散相的玻璃化转变温度Tg(s)所受影响更为显著。中间相松弛被确认。
The glass transition temperatures of the regular star styrene-isoprene block copolymers with different molecular weights and different degrees of branching were determined using a linear dilatometer and a dynamic viscoelastic spectrometer. The Tg (s) and Tg (I) values depend on the morphology, degree of branching and molecular weight of the copolymer. Among them, the glass transition temperature Tg (s) of the dispersed phase is affected more significantly. Middle phase relaxation is confirmed.