CAJ | 학술논문

分别采用有机分散剂、溶液浸渍和超临界二氧化碳（SC CO2）协助技术对聚丙烯（PP）进行固相接枝改性。通过自由基聚合制备了PP与马来酸酐（MAH）、丙烯酸（AA）的接枝共聚物（PP-g-MAH/AA），考察了单体投料量、反应时间、反应温度对接枝反应的影响，用傅里叶变换红外光谱（FTIR）对PP-g-MAH/AA进行了表征，并测试了接枝产物的水接触角、热稳定性、熔体流动速率和力学性能。实验结果表明，当单体投料量为6%，100℃下反应2h时，三种协助方法的接枝效率均达到最大值，SC CO2协助技术对PP接枝改性的接枝率和接枝效率较最高，可达5.33%和88.83%。测试结果表明，SC CO2协助技术制得PP接枝产物热稳定性最好、水接触角最小。
분별채용유궤분산제、용액침지화초림계이양화탄（SC CO2）협조기술대취병희（PP）진행고상접지개성。통과자유기취합제비료PP여마래산항（MAH）、병희산（AA）적접지공취물（PP-g-MAH/AA），고찰료단체투료량、반응시간、반응온도대접지반응적영향，용부리협변환홍외광보（FTIR）대PP-g-MAH/AA진행료표정，병측시료접지산물적수접촉각、열은정성、용체류동속솔화역학성능。실험결과표명，당단체투료량위6%，100℃하반응2h시，삼충협조방법적접지효솔균체도최대치，SC CO2협조기술대PP접지개성적접지솔화접지효솔교최고，가체5.33%화88.83%。측시결과표명，SC CO2협조기술제득PP접지산물열은정성최호、수접촉각최소。
The solid-phase grafting of polypropylene which the was investigated by adopting solution dipping method、the presence of organic dispersant and supercritical carbon dioxide(SC CO2) solid-phase assist technolo-gy respectively. The graft copolymer of PP and MAH or AA (PP-g-MAH/AA) was prepared by free radical poly-merization. Influences of inventory rating of monomer,reaction temperature,and reaction time were investigated.The PP-g-MAH/AA was characterized by FTIR. The water contact angle,Thermal stability, melt flow rate and me-chanical property of the copolymer were tested. The laboratorial results show that both of the graft copolymer for the three means have the best grafting efficiency when we prepare it under 100℃for 2 hours with the 6%invento-ry rating of monomer, and supercritical carbon dioxide (CO2) SC solid-phase assist technology has the best graft-ing ratio and grafting efficiency:5.33%and 88.83%. The tests result indicate that the graft copolymer of PP which was prepared by supercritical carbon dioxide(CO2) SC solid-phase assist technology has excellent thermal stability and minimal water contact angle.