新型环氧丙烯酸树脂增韧剂的合成

Synthesis of New Flexibilizer of Epoxy Acrylate Resin

用马来酸酐和聚乙二醇1000合成了具有反应活性端基的聚乙二醇,用红外与核磁共振测试技术对产物进行了表征,并用产物对环氧丙烯酸树脂进行了改性;研究了反应温度、反应时间对反应及产物性能的影响。结果表明,n(马来酸酐)∶n(聚乙二醇1000)=2.1∶1,在75℃、反应60 min,转化率高达95.2%。用红外光谱对反应性聚乙二醇和环氧丙烯酸树脂的固化物进行了分析。结果表明,反应性聚乙二醇参与了环氧丙烯酸树脂的固化反应,可在交联网络中构成不同长度的柔性链段,显著地提高了环氧丙烯酸树脂的冲击强度。

Polyethylene glycol with reactive chain ends was synthesized from maleic anhydride and polyethylene glycol and used as a modifier for the epoxy acrylate resin.The product was characterized by FTIR and 1H NMR.The influence of reaction temperature and time on the reaction and properties of the reactive polyethylene glycol is discussed.When the molar ratio of the maleic anhydride and polyethylene glycol was 2.1∶1,the conversion rate of the reaction reached 95.2% at 75 ℃ for 60 min.The cured sample of reactive polyethylene glycol with epoxy acrylate resin was characterized by FTIR.The results indicate that the reactive polyethylene glycol participated in the curing reaction of the epoxy acrylate resin,forming soft segments in the network,which significantly increased the impact strength of the epoxy acrylate resin.