多相聚合物体系的归并行为研究进展  

Advance in Research of the Coalescence Behavior of Multiphase Ploymer Blends

作　　者：陈绪煌[1] 余鹏[1] 李纯清[1] 盛京[2] 

机构地区：[1]湖北工业大学化学与环境工程学院,武汉430068 [2]天津大学材料科学与工程学院,天津300072

出　　处：《高分子通报》2011年第2期48-54,共7页Polymer Bulletin

摘　　要：多相聚合物体系的相归并指热力学不相容的聚合物共混体系,发生相分离后,分散相粒子发生有效碰撞,分散颗粒聚集而长大的过程。本文综述了多相聚合物体系的相归并机理、研究方法及加工过程的归并行为。归并过程可以在退火条件下进行,也可以在剪切条件下进行。多相聚合物在熔融状态下的退火会引起分散相颗粒之间的聚集,称为静态归并。在一定的流动条件下由剪切流动导致的分散相颗粒的聚集称为剪切诱导归并。小角激光散射技术可以在流变仪中原位、实时的在线观测,适合进行理论研究。注射、挤出等研究加工过程中的归并行为不便用光散射方法,因而主要是加工过程中在线取样,用TEM和SEM分析样品的形貌研究多相聚合物加工过程的归并。相归并主要集中在流变仪中的理论研究,而加工过程归并行为更有实用意义,但研究不多。研究加工过程的相归并规律、机理及其动力学方程,设计合适的界面结构及加工工艺等控制其加工过程的相归并行为,可以实现材料相态结构的稳定。The coalescence of multiphase polymer systems is a process which effective collision and coarsening behavior of dispersed particles happened after phase separation of thermodynamics incompatible polymer blending systems. In this paper, the phase coalescence mechanism and research methods of multiphase polymer systems and the coalescence behavior during processing were summarized. The coalescence process could happenned either in annealing conditions or in shearing conditions. Static coalescence means the aggregation of dispersed particles caused by multiphase polymers＇s annealing under molten status. Flow driven coalescence means the aggregation of dispersed particles caused by polymers＇s shearing flow under certain flow conditions. SALS（small-angle laser light scattering） is a in situ and in real time on-line observation technique, which is fit for theoretical research. Because it is inconvenient to use light scattering method in injection and screw, on-line sampling method was mainly used to research the coalescence of multiphase polymers during processing by TEM and SEM. Current coalescence researches were mainly focused on theoretical method of rheometer. Researches on coalescence behavior during processing were few although its was more significant in practice. Not only the research of regularity, mechanism and dynamical equation of coalescenceduring processing, but also the design of appropriate interracial structure and processing technology to control the coalescence behavior of processing could achieve the stability of phase structure.

关 键 词：多相聚合物 相形态 归并 理论 

分 类 号：O631.3[理学—高分子化学]