Korigodskii Andrei A, Zhirnov Artem E, Kechekyan Alexander S, Zezin Sergey B
Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia.
Enikolopov Institute of Synthetic Polymer Materials, Russian Academy of Sciences, Profsoyuznaya ul. 70, 117393 Moscow, Russia.
Polymers (Basel). 2022 May 27;14(11):2171. doi: 10.3390/polym14112171.
Polymer blends, obtained by polymerization of methyl methacrylate in the presence of poly(propylene glycol), are investigated. Poly(propylene glycol) acts as a plasticizer, significantly lowering poly(methyl methacrylate)'s glass transition temperature and decreasing its elasticity modulus and yield stress. The mixture of methyl methacrylate with poly(propylene glycol) is more stable than its mixture with currently used poly(ethylene glycol), which leads to more uniform distribution and higher possible content of the plasticizer. Unlike low molecular weight plasticizers, poly(propylene glycol) is less prone to migration and exudation during manufacturing process and in use, and has low toxicity. Dynamic mechanical thermal analysis, compression testing and X-ray diffraction were used to investigate how the properties of the material depend on the content and molecular weight of the poly(propylene glycol) in the polymer blend. It was shown that the dependence of the glass transition temperature of methyl methacrylate polymerized in the presence of poly(propylene glycol) on the molar fraction of propylene glycol units is linear, and poly(propylene glycol) with lower molecular weight affects properties of the material stronger than poly(propylene glycol) with higher molecular weight. Therefore, the addition of poly(propylene glycol) allows to control the properties of poly(methyl methacrylate) easily and within wide range.
研究了在聚丙二醇存在下通过甲基丙烯酸甲酯聚合得到的聚合物共混物。聚丙二醇作为增塑剂，显著降低了聚甲基丙烯酸甲酯的玻璃化转变温度，并降低了其弹性模量和屈服应力。甲基丙烯酸甲酯与聚丙二醇的混合物比其与目前使用的聚乙二醇的混合物更稳定，这导致增塑剂分布更均匀且含量更高。与低分子量增塑剂不同，聚丙二醇在制造过程和使用过程中不易迁移和渗出，且毒性低。采用动态力学热分析、压缩测试和X射线衍射来研究材料性能如何取决于聚合物共混物中聚丙二醇的含量和分子量。结果表明，在聚丙二醇存在下聚合的甲基丙烯酸甲酯的玻璃化转变温度对丙二醇单元摩尔分数的依赖性是线性的，且低分子量的聚丙二醇比高分子量的聚丙二醇对材料性能的影响更强。因此，添加聚丙二醇可以轻松且在宽范围内控制聚甲基丙烯酸甲酯的性能。
