泡沫塑料加工过程中的气泡成核理论(Ⅰ)——经典成核理论及述评  

Research on Bubble Nucleation Theory during the Process of Foam Plastics (I)—— review and classical theory of bubble nucleation

作　　者：蔡业彬[1] 国明成[2] 彭玉成[2] 谢存禧[2] 

机构地区：[1]茂名学院,广东茂名525000 [2]华南理工大学,广东广州510640

出　　处：《塑料科技》2005年第3期11-16,共6页Plastics Science and Technology

基　　金：国家自然科学基金重点资助项目(10172074 A020205);广东省科技计划项目(2003C103015)

摘　　要：　介绍了泡沫塑料加工过程中气泡成核的经典理论,给出了几种成核方式的临界成核半径、所需克服的吉布斯(Gibbs)自由能及成核速率的计算公式;评述了经典成核理论的发展,包括自由体积和气体过饱和度对气泡成核的影响,并分析指出了经典成核理论对动态聚合物熔体气泡成核解释存在的不足。It introduced the classical theory of bubble nucleation during the process of foam plastics, and presented the calculation formulas about the radius of critical nucleation, required Gibbs free energy and nucleation rate of some kinds of nucleation. It reviewed the development of classical theory of bubble nucleation, including the influence of free volume and oversaturation on bubble nucleation, and pointed out the existing deficiencies in explanation of classical theory of bubble nucleation to bubble nucleation of dynamic polymer melt.

关 键 词：泡沫塑料 均相成核 异相成核 自由体积 饱和度 

分 类 号：TQ328[化学工程—合成树脂塑料工业]