期刊
REACTIVE & FUNCTIONAL POLYMERS
卷 73, 期 7, 页码 898-903出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.reactfunctpolym.2013.03.015
关键词
Tetra-PEG gel; AB-type crosslink coupling; Ideal polymer network; Elastic modulus; Fracture energy
Tetra-PEG gel has drawn much attention as a polymer gel with extremely suppressed heterogeneity, which is known as the intrinsic characteristics of polymer networks, and is difficult to control. Tetra-PEG gel is formed by a novel fabrication method, i.e., AB-type crosslink coupling, which is polycondensation between mutually reactive multi-armed polymers forming a polymer network. AB-type crosslink coupling has advantages on suppressing the heterogeneity over conventional polycondensation. In this review, we focused on the gelation reaction and the relationship between the mechanical properties and structure. The reaction proceeded as a simple second order reaction of A and B end-groups from the initiation to the end (approx. 90%), suggesting the homogeneous mixing of two prepolymers. The model predicting the elastic modulus of Tetra-PEG gel shifts from the phantom to affine network models with an increase in polymer concentration. The fracture energy is well predicted by the Lake-Thomas model. These experimental studies also suggest that Tetra-PEG gel has extremely homogeneous network structure and is a candidate material for evaluating the basic physical properties of polymer gels. (c) 2013 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据