聚丙烯固相接枝丙烯酸制备亲水性聚丙烯的研究  

Study on Solid Phase Grafting of Acrylic Acid onto Polypropylene to Prepare Hydrophilic Polypropylene

作　　者：姚瑜[1] 张军[1] 王晓琳[2] 张勇[1] 温建志 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]清华大学化学工程系,北京100084 [3]山东招远膜天集团有限公司,山东招远265400

出　　处：《合成材料老化与应用》2005年第3期1-6,共6页Synthetic Materials Aging and Application

基　　金：国家"863"资助项目(No:2002AA328020)

摘　　要：研究了聚两烯(PP)固相接枝丙烯酸(AA)的反应工艺,深讨了反应时间、反应温度、单体用量及引发剂用量等因素对接枝反应的影响。通过FTIR证实AA确实接枝到PP链上形成PP-g-AA接枝物,并采用水接触角方法表征了接枝物的亲水性能。实验结果表明,当反应温度为120℃,反应时间为90min,PP:AA:BPO=100:10:0.4(massratio)时,可获得AA最大接枝率1.31%,与未接枝的聚丙烯相比,接枝物水接触角由90°减小到81°,亲水性能得到明显改善。DSC结果表明,固相接枝物PP-g-AA的熔融温度Tm和结晶温度Tc略有下降,结晶焓△Hc、熔融焓△Hm略有上升,结晶速率加快,结晶度有所提高;接枝改性提高了PP的热稳定性。Solid phase grafting technology for acrylic acid （AA） onto polypropylene （PP） was studied in details, and the effects of the factors, including reaction time, reaction temperature, as well as concentration of monomer and initiator, on grafting reaction were also investigated. It was proved by FTIR that AA was actually grafted onto the PP backbone. Contact angle of water was measured to characterize the hydrophilicity of grafted PP. The results showed that the maximum graft degree was achieved as 1.31% when the reaction was operated under 120℃, for 90min with PP： AA： BPO =100： 10： 0.4（ mass ratio）. The contact angle of the grafted PP decreased from 90°（original PP） to 81°, indicating the improvement of hydrophilicity. It was found by DSC that PP solid phase grafting AA copolmer （PP-g-AA） possess lower melting and crystallization temperatures（Tm and Tc）, higher melting and crystallization enthalpy, larger crystallization rate as well as crystallinity than the original PP. The results of TGA indicated that graft modification could enhance the thermal stabilitv of the material.

关 键 词：聚丙烯 固相接枝 丙烯酸 亲水性 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]