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根据教科书和专著中的经典理论,具有相分离结构的二元聚合物共混物的两个玻璃化转变温度(Tg)应向相互靠近的方向移动或保持不变,具体值取决于两聚合物的相容性.在橡塑共混物中,具有较高玻璃化转变温度的塑料相的Tg应该维持不变或向较低的橡胶相Tg方向移动.我们在研究中发现了反常现象:在粒径为100nm左右的超细橡胶粒子与塑料的共混物中塑料相的Tg会反常地升高,这很难用现有理论解释.本文详细讨论了这种异常现象,并对其机理进行了探讨.
According to the classical theory in textbooks and monographs, the two glass transition temperatures (Tg) of binary polymer blends with a phase-separated structure should either move towards or stay the same close to each other, depending on the amount of the two polymers . In plastic blends, the Tg of the plastic phase with the higher glass transition temperature should be kept constant or shifted towards the lower Tg of the rubber phase. We found anomalies in the study: at The Tg of the plastic phase in the blend of ultrafine rubber particles and plastic with an average diameter of about 100nm will increase abnormally, which is hard to explain with the existing theory.This dissertation discusses in detail the mechanism of this phenomenon, Exploring.