摘要
提出了一个描述非晶态高分子膜结构特征的模糊数学模型.基于这一模型,作者认为,橡胶态膜内也存在“特征微孔”,并且比玻璃态膜更多.该两种膜的主要吸收机理都是“充孔”机理.运用分子热力学原理,导出了一个普遍化吸收机理模型.本模型假设,非晶态高分子膜内存在两种“格位”,它们对渗透分子的作用各不相同.适用于玻璃态膜的双方式吸收模型和适用于橡胶态膜的Henry定律在这一模型中得到了统一,模型参数也从分子数量级上获得了明确的解释.
A model in fuzzy mathematics was proposed to describe the structure ofan amorphous polymer. On the basis of the structural model, the authors believed that there are more microcavities in a rubbery polymer than in a glassy polymer and hole filling is an important sorption mechanism both above and below the glass-transition temperature. Furthermore, the authors assumed that in an amorphous polymer there are two types of voids with different interactions on penetrants. A generalized sorption model based on the above assumption and molecular thermodynamics was developed which incorporated both the successful daul-mode model below the glass-transition temperature and Henry's law above it. The model parameters can be interpreted on the molecular level.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1992年第1期1-7,共7页
CIESC Journal