在低密度聚乙烯(LDPE)上引入马来酸酐(MAH),作增溶剂增加聚碳酸酯(PC)与聚乙烯(PE)的相容性。通过红外光谱分析可知LDPE上成功接枝了MAH基团;对LDPE-MAH增容的PC/PE合金进行扫描电镜、熔体流动速率(MFR)、力学性能、热变形温度和吸水率测试。结果表明:PC/PE合金相容性明显提高,开始时随着LDPE-MAH添加量的增大,PC/PE合金的MFR下降,力学性能提高,热变形温度上升,吸水率减小;当LDPE-MAH添加质量高于5%后,继续增加其用量,PC/PE合金的MFR反而上升,力学性能和热变形温度有所下降,吸水率保持稳定。
Maleric anhydride was introduced on the LDPE as a compatibilizer to increase the intermiscibility of PC and PE.It can be proved that MAH group was grafted to the LDPE successfully through FT-IR.The PC/PE alloys with the compatibilization of LDPE-MAH were evaluated through test of SEM,MFR,mechanical properties,heat deflection temperature and water absorption rate.The results showed that the intermiscibility of PC/PE alloys was raised.Besides,mechanical properties and heat deflection temperature of the PC/PE alloys increased while MFR and water absorption rate declined as the content of LDPE-MAH increased firstly.Nevertheless,mechanical properties and heat deflection temperature of the PC/PE alloys declined a little while MFR began to increase and water absorption rate remained stable when the content of LDPE-MAH surpassed 5wt%.
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基金资助
广东省自然科学基金项目(2018A030313237);广州市科技计划项目(201802010065、201803030044和201902010025);广东省省级科技计划项目(2017A070701024、2017A070701022、2017B030314081和2017B090907026)
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