【摘要】 目前玻璃化转变温度一般都通过实验获得,但是同一样品采取不同方法,结果有较大差别。采用传统测量方法,既浪费时间又很繁琐,并且测量仪器昂贵。应用基团贡献法计算生物高聚物及共混、共聚的玻璃化转变温度,计算结果与实验值吻合较好。介绍塑性方程如Gordon-Taylor和Couchman-Karasz方程。这些信息有利于食品科学研究及冷冻食品加工和储藏。更多还原

【Abstract】 Nowadays glass transition temperature is usually obtained by experiments,but the results have a great difference for the same sample through different methods.There exist some drawbacks for traditional measure methods such as waste of time,complex of process and expensiveness of instrument.The calculating results are in good agreement with experimental values by using group- contribution technique to calculate glass transition temperature of biopolymers and its blends and copolymers.The plasticization equations such as Gordon-Taylor equation and Couchman-Karasz equation were introduced.The information is beneficial to research of food science and processing and storage of frozen foods.更多还原