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为了提高聚丙烯(PP)的亲水性和染色性,以二苯甲酮(BP)为光引发剂、使用固相光接枝反应装置,采用固相紫外光接枝法在PP粒料表面接枝丙烯酸(AA)单体,并研究了单体含量、引发剂用量、辐照时间和溶胀时间对接枝率的影响规律,以及PP接枝前后力学性能的变化。结果表明,AA用量为1mL、引发剂用量为0.15g、辐照时间为30min、溶胀时间为12h时的接枝率最高。接枝率为5.2%左右,上染率为43.4%时,接枝PP的拉伸强度降了1.37MPa,但断裂伸长率从358.3%增加到396.3%,说明丙烯酸适度接枝对力学性能影响不大。
In order to improve the hydrophilicity and dyeability of polypropylene (PP), benzophenone (BP) as photoinitiator, solid-phase photo-grafting reactor and solid-phase UV grafting method were used on the surface of PP pellets Grafted acrylic acid (AA) monomer, and the influence of monomer content, initiator dosage, irradiation time and swelling time on the grafting rate were studied, and the mechanical properties of PP were studied. The results showed that when the amount of AA was 1mL, the amount of initiator was 0.15g, the irradiation time was 30min and the swelling time was 12h, the grafting rate was the highest. The grafting rate was about 5.2%, the dyeing rate was 43.4%, the tensile strength of grafted PP decreased by 1.37MPa, but the elongation at break increased from 358.3% to 396.3%, indicating that the proper grafting of acrylic acid on the mechanical properties Not big.