水性光固化改性氯化聚丙烯的制备及性能

以丙烯酸(AA)和甲基丙烯酸羟乙酯(HEMA)对氯化聚丙烯(CPP)进行溶液接枝改性。考察了AA与HEMA两种单体总用量(AA与HEMA两种单体质量之和占CPP质量的百分数,下同)及引发剂用量(即引发剂质量占CPP及单体总质量的百分数,下同)对接枝率的影响,得到了最佳AA与HEMA总用量为20%,最佳引发剂用量为3%,在该条件下接枝率达到8.81%。然后以甲基丙烯酰氯对接枝改性CPP进行光固活性成分改性,研究了不同AA用量的水性光固化改性CPP乳液性能、表面张力及附着力。结果表明,AA用量占AA和HEMA总质量20%~50%,均能形成乳液,乳液粒径随AA用量增多而减小;水性化改性产物经光固活性成分改性后,以及经光固活性成分改性后的产物光固化前后,表面性能良好,表面张力均在40 m N/m以上,附着力得到提高。该材料符合环保要求,具有良好的应用前景。

Preparation and Properties of Waterborne UV curable Chlorinated Polypropylene

Acrylic acid(AA) and hydroxyethyl methacrylate(HEMA) were grafted onto chlorinated polypropylene(CPP) via solution polymerization. The effects of the content of acrylate monomer and the content of initiator on the graft ratio were investigated. The optimum conditions of the graft reaction was that the content of the acrylate monomer was 20%(compared to the mass of CPP) ,the content of the initiator was 3%( compared to the total mass of CPP and AA and HEMA) and the graft ratio reached 8.81%.On the basis of the graft reaction, the grafted CPP was UV modified by methacryloyl chloride. The performance of emulsion ,the surface tension and the adhesion of series of waterborne UV curable CPP with different AA content were investigated. The results showed that stable emulsion was obtained when the content of AA was 20~50%(compared to the total mass of AA and HEMA), and the particle size of the emulsion decreased with the content of AA increased. After UV modified by methacryloyl chloride and after UV cure, the surface property was good ,the surface tension was 40 mN/m or more, the adhesion was improved. This material meets the environmental requirements and has good application prospect.