新型聚酯增塑剂的合成及增塑聚氯乙烯性能

Synthesis of a Novel Polyester Plasticizer and Its Plasticizing Effect in Poly( vinylchloride)

以生物质化工产品衣康酸加氢产物2-甲基丁二酸为原料,采用熔融缩聚法制备了一种新型聚酯增塑剂聚2-甲基丁二酸1,3-丙二醇酯,采用红外光谱(FTIR)和核磁共振(1H NMR)对聚酯的结构进行了表征.通过扫描电镜(SEM)、动态力学分析(DMA)、拉伸测试对该聚酯增塑聚氯乙烯(PVC)的增塑效果进行的表征结果表明,该聚酯与PVC相容性良好,可大大改善PVC材料的硬度,增加其断裂伸长率,降低PVC的玻璃化转变温度、拉伸强度及拉伸模量.与小分子增塑剂邻苯二甲酸二辛酯(DOP)相比,合成的新型聚酯增塑剂具有优异的耐抽出性、耐挥发性和耐迁移性,可提高PVC材料的使用寿命.

A novel plasticizer based on the hydrogenation of itaconic acid,poly（ 1,3-propylene 2-methylsuccinate）（ 1,3-PPM） was synthesized by 1,3-propanediol and 2-methylsuccinate acid through melt polycondensation. The plasticizing effect in poly（ vinyl chloride）（ PVC） was characterized. The results showed that 1,3-PPM displayed excellent compatibility with PVC. The glass transition temperature,tensile strength,tensile modulus and hardness of PVC films plasticized by 1,3-PPM decreased and elongation at break increased significantly with the increasing of plasticizer. Furthermore,compared to the traditional plasticizer dioctyl phthalate（ DOP）,1,3-PPM had superior durability（ volatility resistance,extractability and migration stability）.