三异丙氧基镝改性P（MMA-co-St）共聚物的研究

Study on Modified Copolymer of P (MMA-co-St) with Dysprosium Tri-isopropoxide

摘要:

一定比例的三异丙氧基镝[Dy(OPr^i)3】与甲基丙烯酸甲酯(MMA)／苯乙烯(St)的混合单体(单体摩尔比为1：1混合后能迅速形成1种凝胶体，此凝胶体经原位聚合后即获得含镝的P(MMA-co-St)共聚物。研究Dy(OPr^i)3对P(MMA-co-St)共聚物性能的影响表明，共聚物中MMA与St以交替共聚为主组成，随Dy含量增加，共聚物的结构逐渐由线型向交联网状结构转变，并使共聚物的耐热性、耐溶剂性、贮能模量及荧光强度均得到提高；所获得的共聚物是一类稀土含量高、透明性良好的高分子材料。

Abstract:

The P (MMA-co-St) copolymer containing dysprosium was prepared by the in-situ polymerization of a gel, which was obtained by doping directly dysprosium tri-isopropoxide in the monomer mixtures of methyl methacrylate and styrene (monomer mole ratio was 1:1). The effect of dysprosium tri-isopropoxide on the properties of P (MMA-co-St) copolymer was also studied. It was shown that the linear structure of P (MMA-co-St) containing dysprosium changed into a crosslinked network with increasing dysprosium content, resulting in improvement of properties, such as resistance to heat and solvent, storage modulus and fluorescence strength. Moreover the copolymer is a material with high uniformly distributed rare earth content and improved transparency.