聚乳酸的θ温度及其与溶度参数、相互作用参数的关系  

θ temperature of poly(L-lactide) and its relationship with solubility parameter and interaction parameter

作　　者：唐四叶[1] 曹欣祥[1] 崔路风 张云 TANG Si-ye;CAO Xin-xiang;CUI Lu-feng;ZHANG Yun(College of Chemistry and Chemical Engineering,Luoyang Normal University,Luoyang 471934,China)

机构地区：[1]洛阳师范学院化学化工学院

出　　处：《云南大学学报（自然科学版）》2019年第6期1208-1212,共5页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家自然科学基金(21476102);河南省科技发展计划(182102410072)

摘　　要：由逐步升温法测定了聚乳酸溶液的浊点温度.根据浊点温度与体积分数的关系,获得了聚乳酸溶液的θ温度.结果表明:聚乳酸在2-己酮、环己醇、乳酸乙酯、溴苯、环己酮和氯苯中的θ温度分别为434.22 K、422.12 K、414.08 K、408.00 K、399.36 K和392.46 K,θ温度的变化符合溶度参数相近原则;θ温度随聚乳酸与溶剂溶度参数差值的降低而降低,随相互作用参数的下降而下降.θ温度与溶度参数差值之间的关系、θ温度与相互作用参数之间的关系均可用指数函数来准确描述.The cloud point temperatures of poly(L-lactide) solutions were measured by stepwise warming.According to the relation between volume fraction of poly(L-lactide) and cloud point temperature, the θtemperature of poly(L-lactide) solutions were obtained. The θ temperatures of poly(L-lactide) in 2-hexanone,cyclohexanol, ethyl lactate, bromobenzene, cyclohexanone, and chlorobenzene are 434.22, 422.12, 414.08, 408.00,399.36 K and 392.46 K, respectively. The variation of θ temperature accords with the principle of similar solubility parameter. The θ temperature decreases with the decrease of the absolute value of the solubility parameter difference between poly(L-lactide) and the solvent. Meanwhile, the θ temperature decreases with the decline of interaction parameter. The exponential function can accurately express the relationship between θ temperature and solubility parameter absolute difference as well as the relationship between θ temperature and interaction parameter.

关 键 词：聚乳酸 θ温度 溶度参数 相互作用参数 

分 类 号：TQ311[化学工程—高聚物工业]