P(3 HB-co-4 HB)微波接枝顺丁烯二酸酐的研究

Study of the Microwave Grafting of Maleic Anhydride onto P(3 HB-co-4 HB)

以聚(3-羟基丁酸酯-co-4-羟基丁酸酯)[P(3 HB-co-4 HB)]和顺丁烯二酸酐(MAH)为原料,通过微波辐照制备P(3 HB-co-4 HB)-g-MAH接枝共聚物.采用红外光谱仪(FTIR)、差示扫描量热仪(DSC)和热物台偏光显微镜(PLM)研究了单体用量、引发剂用量、辐照时间对接枝反应的影响,接枝率对P(3 HB-co-4 HB)结晶形态、亲水性以及熔融行为的影响.结果表明:在微波作用下,MAH可与P(3 HB-co-4 HB)发生接枝反应,实验所得接枝率达0.30%～0.78%;且接枝率越高,P(3 HB-co-4 HB)-g-MAH的球晶尺寸越小,亲水性越好,熔融温度越低.

P （3 HB-co-4 HB）and maleic anhydride （MAH）were selected as raw materials to prepare P （3 HB-co-4 HB）-g- MAH grafting copolymer through microwave irratation. FITR, DSC and PLM were used to characteristize the effects of the dosage of monomer, initiator, as well as irratation time on grafting reaction and also to investigate the crystalline morphology, hydrophilicity and melting behaviors of P （3 HB-co-4 HB） against different grafting ratios. The results show that the grafting reaction of MAH onto P （3 HB-co-4 HB） could be carried out under microwave irratation and grafting ratios from 0.30% to 0.78% could be obtained. The higher grafting ratio, the finer spherulite size, the better hydrophilic and the lower melting temperature of P （3 HB-co-4 HB） -g-MAH.