两亲性改性剂PP-g-PEGMA的制备及其表征

摘要

以聚甲基丙烯酸乙二醇酯(PEGMA)为接枝单体,聚丙烯(PP)为接枝主链,过氧化二异丙苯(DCP)为聚合引发剂,采用熔融接枝法制备了两亲性改性剂PP-g-PEGMA,考察了单体用量和引发剂用量对改性剂接枝率、接枝效率的影响,并通过傅里叶红外光谱(FTIR)、X射线光电子能谱分析(XPS)、接触角测试对接枝聚合物进行了表征.结果表明:接枝聚合物在1 730 cm-1处出现吸收峰,说明PEGMA成功地接枝到PP大分子链上;当单体用量在15份,引发剂质量分数在0.3％时,接枝效果最佳;接枝聚合物PP-g-PEGMA具有很好的亲水性,当PP-g-PEGMA的接枝率为3.21％时,接触角可降低至70°.%Using poly(ethylene glycol methacrylate)(PEGMA) as the grafting monomer,polypropylene (PP) as the grafting chain,dicumyl peroxide (DCP) as an initiator,the amphiphilic modifier PP-g-PEGMA was prepared by melt graft polymerization.The effects of different amounts of monomer and initiator on the grafting rate and grafting efficiency of the modifier were investigated.The grafted polymers were characterized by FTIR,XPS and contact angle.The results show that characteristic peaks of the grafting copolymer appears at 1 730 cm-1,which indicated that PEGMA monomer was grafted onto the PP chain successfully.The grafted polymer can achieve the best effect,when the concentration of monomer is 15 phr,and the mass fraction of initiator is 0.3％.The grafted polymer PP-g-PEGMA has good hydrophilicity,and the contact angle can be reduced to 70when the grafting rate of PP-g-PEGMA is 3.21％.