用调制式差示扫描量热法表征尼龙6和聚乳酸升温热行为  

Characterization of Thermal Behaviors of Nylon6and Polylactate by Modulated Differential Scanning Calorimetry

作　　者：曾春莲[1] 张艺[2] 汪丽[1] 赵剑豪[1] 许家瑞[2] 

机构地区：[1]中山大学化学与化学工程学院高分子化学与物理国家重点学科实验室,广东广州510275 [2]中山大学化学与化学工程学院材料科学研究所,广东广州510275

出　　处：《分析测试学报》2003年第4期70-73,共4页Journal of Instrumental Analysis

摘　　要：用调制式差示扫描量热法 (MDSC)表征尼龙6和聚乳酸升温过程热行为 ,MDSC把总热流分解成可逆热流ΔHrev 和不可逆热流ΔHnon;实验结果表明纯尼龙及其共混体系升温熔融过程中包含了可逆放热峰 ;共混体系不同 ,可逆热流ΔHrev 不同 ,都比纯尼龙小 ;纯尼龙可逆热流ΔHrev 随调制周期延长而增大 ;聚乳酸玻璃化转变区 ,随老化时间的延长和老化温度的提高 ,玻璃化转变温度Tg 提高 。The thermal behaviors of nylon6and aged polylactate series in heating process were characterized by modulated differential scanning calorimetry(MDSC).The total heat flow could be divided into reversing heat flow(ΔH rev )and non_reversing heat flow(ΔH non )by MDSC technique.It was shown that nylon6and its blends exˉhibited reversing exothermic behaviors during melting process.TheΔH rev of different blends were different,and all less than nylon6.TheΔH rev of nylon6increased with increasing modulated periods.For polylactate,the glass_ transition temperature and relaxation heat enthalpy increased with increasing aging time and temperature.

关 键 词：调制式差示扫描量热法 表征 尼龙6 聚乳酸 升温热行为 玻璃化转变 熔融特性 

分 类 号：TQ342.11[化学工程—化纤工业] O657.99[理学—分析化学]