【摘要】 本文利用聚甲醛链的键长涨落模型 ,研究了聚甲醛单链的玻璃化转变 .聚甲醛单链的键平均能量随温度增加而增加 ,比热在玻璃化转变温度 Tg 附近发生突变 ,同时发现 Tg 与链长 N有 :Tg=T∞g -A/ N的关系 .更多还原

【Abstract】 In this article, the glass transition temperature of a single polyoxymethylene(POM) chain adopting the modified bond fluctuation model was studied. It was found that the energy Per Kuhnian bond of a single polyoxymethylene chain increases slowly at T<T g and rises significantly at T>T g , and the specific heat of this system is discontinuous around the glass transition temperature T g . The relation between T g and the chain length N is T g=T ∞ g-A/N .更多还原