對于(yu)結晶聚(ju)合物，用DSC（DTA）測定(ding)其結晶熔融(rong)(rong)時(shi)，得到(dao)的熔融(rong)(rong)峰曲線(xian)和基線(xian)所(suo)包圍的面積，可直接換算成熱量。此(ci)熱量是聚合物中(zhong)結晶部分的熔融(rong)(rong)熱△H_f。聚合物熔融熱(re)與(yu)其結晶度成正(zheng)比,結晶度越高,熔融熱越大