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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 730cm-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°。
Polyethylene glycol methacrylate (PEGMA) as grafting monomer, polypropylene (PP) as grafting backbone and dicumyl peroxide (DCP) as polymerization initiator were prepared by melt grafting Amphiphilic modifier PP-g-PEGMA was used to investigate the influence of the amount of monomer and initiator on the grafting degree and grafting efficiency of modifier. Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron energy Spectral analysis (XPS), contact angle test graft polymers were characterized. The results showed that the graft polymer showed an absorption peak at 1 730 cm-1, indicating that PEGMA was successfully grafted onto the PP macromolecule chain. When the monomer content was 15 and the initiator mass fraction was 0.3%, the grafting effect The graft polymer PP-g-PEGMA has good hydrophilicity. When the graft ratio of PP-g-PEGMA is 3.21%, the contact angle can be reduced to 70 °.