石墨烯对ABS/PC共混物耐紫外光辐照性能的影响

Effect of Graphene on the UV-resistance of ABS/PC Blends

采用红外光谱、差示扫描量热法和扫描电子显微镜并结合拉伸性能分析,研究了石墨烯对聚(丙烯腈-丁二烯-苯乙烯)/聚碳酸酯(ABS/PC)共混物耐紫外光辐照性能的影响。结果表明,紫外光辐照过程中,虽然PC组分未发生明显的结构变化,但ABS组分的分子结构受到破坏,产生羰基、羟基等含氧基团化合物,导致力学性能劣化。辐照100 h,共混物的拉伸强度由58.68 MPa降低至49.72 MPa,拉伸断裂伸长率由11.65%降低至3.3%;引入石墨烯后,共混物在紫外光辐照下的老化过程受到抑制,且这种抑制作用随着石墨烯含量的增加而增强。引入1%的石墨烯,即可使共混物发生由韧至脆的转变所经历的辐照时间由100 h延长到200 h。通过引入石墨烯,能提高ABS/PC共混物耐紫外光辐照性能。

The effect of graphene on the UV-resistance of poly（ acrylonitrile-butadiene-styrene）（ ABS） / polycarbonate（ PC） blends was studied by investigating the variation of molecular structure,surface morphology and tensile performance of the blends through FT-IR,SEM and mechanical performance testing. The results show that,in the process of UV irradiation,the structure of the ABS component is destroyed though the PC component dose not has an obvious structural change,producing compounds containing carbonyl,hydroxyl and other oxygen group and resulting in a deterioration of mechanical performance. After UV irradiating for 100 h,the tensile strength of ABS / PC declines from 58. 68 MPa to 49. 72 MPa,and the elongation at break reduces from 11. 65% to 3. 3%. With the introduction of graphene,the aging process of the blends is inhibited,which is enhanced with the increase of the content of graphene. Only 1% graphene makes the blend resist much longer UV irradiation,200 h of irradiation makes the blend a brittle fracture,while that is only 100 h for the blend without introducing graphene. Graphene can enhance the UV resistance of ABS / PC blends.