高分子结晶和熔融行为的FlashDSC研究进展  

Recent Progress on Flash DSC Study of Polymer Crystallization and Melting

作　　者：李照磊[1,2] 周东山[1] 胡文兵[1] 

机构地区：[1]南京大学化学化工学院高分子科学与工程系,教育部高性能高分子材料重点实验室,南京210093 [2]江苏科技大学材料科学与工程学院,镇江212003

出　　处：《高分子学报》2016年第9期1179-1197,共19页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号21474050)资助项目

摘　　要：近年来,作为常规示差扫描量热仪(DSC)技术的发展,商业化的快速扫描芯片量热技术(fast-scan chip-calorimeter,FSC)对推动高分子结晶学研究进展发挥了重要的作用.本文首先介绍了闪速示差扫描量热仪Flash DSC的研发历程及其对高分子结晶样品的测试技术,然后举例介绍了其在高分子结晶和熔融行为研究中的一些应用,包括总结晶动力学、晶体成核动力学、成核剂和填料对结晶的影响、共聚单元对结晶的影响、多重熔融峰的鉴定、折叠链片晶的不可逆和可逆熔化、以及极性大分子晶体的熔融等.Flash DSC极大地扩展了扫描温度速率范围,使得其研究的时间窗口能与实际高分子材料加工过程和计算机分子模拟的时间窗口相互匹配,所提供的综合信息有助于我们更好地理解高分子结晶、退火和熔融行为的微观机理.In recent years, fast-scan chip-calorimeter （FSC）, as a new development from conventional differential scanning calorimeter （DSC）, has gave an impetus to the progress in the field of polymer crystallization and melting. As the first user in this field of China,we made a survey on the recent progress of the issue. We first introduced the history of commercial FSC, followed with its measurement techniques on polymer semi-crystalline samples. We then provided several examples on the applications of this technique in the study of polymer crystallization and melting behaviors, including overall crystallization kinetics, crystal nucleation kinetics,the effects of nucleation agents, fillers and comonomers on crystallization,the identification of multiple melting peaks, the irreversible and reversible melting of chain-folded lamellar crystals, and the melting of macromolecules with strong intermolecular interactions. The great expansion of temperature-scanning rates in Flash DSC could match to either industrial processing or molecular simulation, and thus provide rich information of combinational approaches on polymer crystallization, annealing and melting behaviors for our better understanding. We hope that this survey can help the readers on reading the literatures related to FSC or on considering this technique as a useful tool in solving the problems related to polymer crystallization and melting, or similar behaviors of other materials.

关 键 词：热分析 高分子物理性质 结晶 

分 类 号：O631[理学—高分子化学]