Semi-Interpenetrating Polymer Networks Prepared by in situ Photo-Crosslinking of Miscible Polymer Blends
Semi-Interpenetrating Polymer Networks Prepared by in situ Photo-Crosslinking of Miscible Polymer Blends
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DOI：
10.1021/ma00103a036
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发表时间：
1994-12
期刊：
影响因子：
5.5
通讯作者：
T. Tamai;A. Imagawa;Q. Tran-Cong
中科院分区：
文献类型：
--
作者：
T. Tamai;A. Imagawa;Q. Tran-Cong
采用原位光交联法，制备了P(S-STAT-CMS)/PVME(10/10)共混物半互穿聚合物网络。为了选择性地交联P(S-STAT-CMS)组分，该共聚物的CMS链段被化学标记为菲。在361nm光照射下，菲发生光二聚反应，诱导P(S-STAT-CMS)链形成网状结构。得到的半互穿聚合物网络的相容性和形态主要取决于交联反应动力学和伴随反应的热力学不稳定性驱动的聚合物扩散之间的竞争。
Semi-interpenetrating polymer networks (semi-IPN) of styrene-(chloromethyl)styrene copolymer (P(S-stat-CMS)) and poly(vinyl methyl ether) (PVME) were prepared by in situ photo-crosslinking of miscible P(S-stat-CMS)/PVME (10/10) blends. To selectively cross-link the P(S-stat-CMS) component, the CMS segments of this copolymer were chemically labeled with anthracene. Upon irradiation at 361 nm, anthracene undergoes photodimerization and induces network formation of P(S-stat-CMS) chains in the blend. The miscibility as well as the morphology of the resulting semi-IPN critically depends on the competition between the cross-linking reaction kinetics and the polymer diffusion driven by thermodynamic instabilities accompanying the reaction