丙烯酸β-羟丙酯与聚氯乙烯膜的紫外光接枝改性

The Graft Modification of β-Hydropropyla crylate and PVC Films by UV

采用液相接枝方法 ,在紫外线辐照下 ,合成了一系列丙烯酸 β-羟丙酯 (β -HPAT) /聚氯乙烯接枝膜。讨论了引发剂浓度、单体浓度、光照时间、光照强度对接枝率的影响。结果表明 ,引发剂浓度为 6 .5 1× 10 -3 mol/L ,单体浓度 2 .0mol/L ,光照时间为 2 .0h ,且光照强度越强时 ,接枝率最大。接枝膜的结构特征通过FT -IR光谱进行了确证 ,最后 ,对接枝膜进行TGA分析 ,结果表明聚氯乙烯经过表面改性后 ,表面极性增大 ,热稳定性大大提高。

By means of liquid phrase grafting method, a series of β-Hydropropylacrylate(β-HPAT)/PVC grafting films were prepared by UV. Initiator concentration,monomer concentration, radiation time, light strength we re studied. When initiator concentration was 6.51×10 -3 mol/L,monomer conc entration was 2 0 mol/L,radiation time was 2.0 hours and light strength was st ronger, grafting ratio was excellent. The structure of the grafting films was pr oved by FT-IR spectrum. Finally TGA of the grafting films showed that thermal st ability and surficial polarity of PVC films modified by β-HPAT was enhanced .