聚己内酯/石墨烯的结晶形态及结晶动力学  

Crystal Morphology and Crystallization Kinetics of Poly(ε-Caprolactone)/Graphene Composites

作　　者：边策[1] 杨永芳[1] 温建国[1] 刘国栋[1] 

机构地区：[1]河北工业大学高分子科学与工程系,天津300130

出　　处：《高分子材料科学与工程》2013年第8期46-49,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(20904009)

摘　　要：采用溶液法制备了聚己内酯(PCL)/氧化石墨烯(GO)、PCL/石墨烯(GE)及PCL/接枝石墨烯(gGE)复合材料,采用偏光显微镜(POM)、差示扫描量热仪(DSC)、热重分析仪(TGA)研究了复合材料的结晶形态、等温结晶动力学及耐热分解性。POM结果表明,GO、GE及gGE的加入能有效地增加PCL的成核密度,使其球晶生长速率增加。DSC结果表明,GO、GE及gGE作为成核剂能有效地加快PCL的结晶速率,当GO和gGE的质量分数为0.2%时,PCL的结晶速率达到最大值。TGA结果表明,PCL的最大失重速率温度为310℃,GO、GE及gGE的质量分数为0.3%时,复合材料的最大失重速率温度分别为320℃、300℃及280℃,GO的加入使PCL的耐热分解性增强,但GE及gGE的加入使PCL的耐热分解性降低。Poly（ε-caprolactone）（PCL）/graphene composites were prepared by ultrasonically mixing PCL with graphene oxide,graphene or graft graphene in N,N-dimethylformamide（DMF）.The crystalline morphology,isothermal crystallization and thermal stability of PCL and PCL/graphene composites were investigated by polarized optical microscopy（POM）,differential scanning calorimetry（DSC） and thermogravimetric analyzer（TGA）.The results reveal that the nucleation densities increase after graphene oxide,graphene or graft graphene was added.The results of isothermal crystallization kinetic investigated by DSC show that graphene oxide,graphene and graft graphene accelerate the crystallization rate of PCL effectively due to their nucleation effect.Maximum crystallization rate is obtained when the mass fraction of graphene oxide or graft graphene is 0.2%.From TGA data,the thermal stability of PCL is enhanced about 10 ℃ when 0.3% graphene oxide was added,but decreases when graphene or graft graphene was added.

关 键 词：聚己内酯 石墨烯 结晶动力学 

分 类 号：TB383[一般工业技术—材料科学与工程]