Hyperbranched Acrylated Aromatic Polyester Used as a Modifier in UV-Curable Epoxy Acrylate Resins

The viscosity,the shrinkage degree and the photopolymerization rate of the epolxy acrylate(EB600) blended with hyperbranched acrylated aromatic polyester(HAAPE) were investigated.The addition of HAAPE into EB600 largely reduces the viscosity of the blend formulation and the shrinkage degree.For example,EB600 resin with 50% weight fraction of HAAPE has the 1250 cps of the viscosity and 2.0% of shrinkage degree,while the pure EB600 resin has 3000 cps of the viscosity and 10.5% of shrinkage degree.The photopolymerization rate of the resin is also promoted by HAAPE addition.The good miscibility between HAAPE and EB600 was also observed from the dynamic mechanical analysis.The tesile,flexural and compressive strength,and the thermal properties of the UV cured films are greatly improved.     

丙烯酸化超支化聚异酞酸酯制作微透镜

微透镜及其阵列在光学通讯、医学诊断,特别是大规模集成光路板等领域具有广泛的应用前景。目前,微透镜及其阵列的制作方法已有很多报道,如热压纹法、模型法和刻蚀法等。但制作高质量、低成本的微透镜及其阵列仍是当前研究的一个热点课题,利用丙烯酸化超支化聚合物较少链缠绕、粘度低、反应活性高等特点,在光引发剂存在下,使其快速固化成型,制得所需尺寸的微透镜。该方法的特点是在二维可移动水平玻璃基板上,树脂液滴由于其重力和表面张力而迅速形成平凸形,经紫外光曝光固化成型,形成规整的微透镜及其阵列。     

超支化聚(胺酯)的合成及其光固化性能研究

采用甲基丙烯酸酐直接改性和先以丁二酸酐或邻苯二甲酸酐酯化再以甲基丙烯酸缩水甘油酯改性所得到的甲基丙烯酸酯化超支化聚 (胺 酯 )齐聚物在光引发剂存在时紫外光辐照下发生快速聚合反应 ;反应速率和双键转化率随超支化分子的结构不同而变化 ;高度交联的涂膜具有较好的热学性能     

超支化聚酯的改性及其结晶性能的研究

用十六酰氯和十八异氰酸酯分别对端羟基的超支化聚酯Boltorn^TMH20改性,可获得粉末状超支化低聚物,具有无定形“内核”及可结晶“外壳”的分子结构.实验结果表明,采用十八异氰酸酯改性的丙烯酸化超支化聚酯的熔点高于十六酰氯改性聚合物.