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首页> 外文期刊>Journal of Applied Polymer Science >Polymerization-induced phase separations in branched poly(methyl methacrylate) synthesis
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Polymerization-induced phase separations in branched poly(methyl methacrylate) synthesis

机译：支链聚甲基丙烯酸甲酯合成中的聚合诱导相分离

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摘要

Methyl methacrylate and ethylene glycol dimethacrylate or 1,6-hexanediol dimethacrylate (HDDMA) were copolymerized in the presence of a nonsolvent (heptane) for poly(methyl methacrylate) (PMMA) to examine the phenomenon of polymerization-induced phase separations (PIPS) in branched PMMA synthesis. The process was dependent upon the amount of nonsolvent and crosslinker in the reaction mixture. Gel particles were obtained in the majority of phase-separated systems, and their formation was promoted by the preferential partition of monomer and crosslinker into the precipitated polymer phase during the phase separation process. Experimental data showed that, because of its lower solubility parameter, HDDMA can be used as crosslinker to minimize gel particle formation in systems where PIPS is present. (c) 2005 Wiley Periodicals, Inc.
机译：甲基丙烯酸甲酯和乙二醇二甲基丙烯酸酯或1,6-己二醇二甲基丙烯酸酯（HDDMA）在聚甲基丙烯酸甲酯（PMMA）的非溶剂（庚烷）存在下进行共聚，以研究在聚合反应中引起的相分离现象（PIPS）。支链PMMA合成。该过程取决于反应混合物中非溶剂和交联剂的量。在大多数的相分离体系中均获得了凝胶颗粒，并且在相分离过程中，单体和交联剂优先分配进入沉淀的聚合物相，从而促进了凝胶的形成。实验数据表明，由于其较低的溶解度参数，HDDMA可用作交联剂，以最大程度减少存在PIPS的系统中凝胶颗粒的形成。 （c）2005年Wiley Periodicals，Inc.

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