低色度聚乙二醇(200)双甲基丙烯酸酯的合成

Synthesis of polyethylene glycol (200) dimethacrylate with light colour

摘要:

以聚乙二醇（PEG-200）和甲基丙烯酸甲酯（MMA）为原料，采用酯交换法合成聚乙二醇（200）双甲基丙烯酸酯大分子功能单体。考察了溶剂、催化剂、阻聚剂和脱色剂对酯交换反应的影响。结果表明，在酯交换反应中，溶剂环己烷能够降低反应温度，且易于脱出副产物甲醇。当m(环己烷)∶m(总反应液) = 2∶5, m(碳酸钾) ∶m(醇酯总质量) = 8.6∶100, m(氢醌单甲醚) ∶m(醇酯总质量) = 1.1∶100和m(脱色剂A)∶m(醇酯总质量) = 2.1∶100时，产率可达到80.2 %，色度为50 APHA。

Abstract:

Polyethylene glycol (200) dimethacrylate was synthesized by transesterification of polyethylene glycol (PEG-200) and methyl methacrylate. The effects of solvent, catalyst, inhibitor and decolorizer on transesterification were investigated. The results show that the solvent of cyclohexane reduce the reaction temperature and remove the by-product of methanol from the solution easily. The yield can reach 80.2 %, and the colour is 50 APHA, when m(cyclohexane) : m(reaction material) = 2 : 5, m(K2CO3) : m(PEG-200 and methyl methacrylate) = 8.6 : 100, m(MEHQ) : m(PEG-200 and methyl methacrylate) = 1.1 : 100, and m(decolorant A) : m(PEG-200 and methyl methacrylate) = 2.1 : 100.