EVA弹性体对PHBV的增韧改性研究  

Toughening modification of PHBV with EVA elastomer

作　　者：黄嘉伟 韩小龙 吴悠 靳玉娟[1,2] 郭茂林 HUANG Jiawei;HAN Xiaolong;WU You;JIN Yujuan;GUO Maolin(School of Chemistry and Materials Engineering,Beijing Technology and Business University,Beijing 100048,China;Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics,Beijing Technology and Business University,Beijing 100048,China)

机构地区：[1]北京工商大学化学与材料工程学院,北京100048 [2]北京工商大学塑料卫生与安全质量评价技术北京市重点实验室,北京100048

出　　处：《中国塑料》2022年第12期16-23,共8页China Plastics

摘　　要：采用熔融共混法,通过在聚(3-羟基丁酸酯-co-3-羟基戊酸酯)PHBV中添加不同比例含量的乙烯-乙酸乙烯酯(EVA)弹性体,制备了一系列PHBV/EVA复合材料,并通过傅里叶红外光谱仪、转矩流变仪、差示扫描量热仪、热失重分析仪、力学性能测试、热台偏光显微镜等设备,对PHBV/EVA复合材料的结构和性能进行表征。结果表明,PHBV与EVA之间的氢键作用、链缠结作用以及相似的主链结构使得二者之间的相容性和分散性较好;随着EVA含量的逐渐升高,PHBV/EVA复合材料的结晶度表现出先升高后降低的趋势;EVA添加量小于10%(质量分数,下同)时,随着EVA含量的增加,PHBV的球晶数量逐渐增加,球晶尺寸逐渐变小;EVA的添加量为30%时,PHBV/EVA复合材料的断裂伸长率和冲击强度增长幅度最大,与纯PHBV相比,分别增长了87.8%和338.4%。A series of poly(3⁃hydroxybutyrate co⁃3⁃hydroxyvalerate)(PHBV)/ethylene vinyl acetate elastomer(EVA)blends were prepared by melt blending using EVA as an impact modifier,and their structure and properties were charac⁃terized using Fourier⁃transform infrared spectrometer,torque rheometer,differential scanning calorimeter,thermogravi⁃metric analyzer,mechanical property test,and hot table polarizing microscope.The results indicated that the compatibili⁃ty and dispersion of PHBV and EVA were enhanced through the hydrogen bonding,entanglement,and similar backbone structure between two polymers.With a gradual increase in the content of EVA,the crystallinity of PHBV/EVA blends increased at first and then tended to decrease at the EVA content less than 10 wt%.Meanwhile,the number of PHBV spherules increased but their size decreased gradually.Compared to pure PHBV,the PHBV/EVA blends with a EVA content of 30 wt%obtained an increase in elongation at break and impact strength by 87.8%and 338.4%respectively.

关 键 词：聚(3-羟基丁酸酯-co-3-羟基戊酸酯) 乙烯-乙酸乙烯酯 增韧 改性 

分 类 号：TQ321[化学工程—合成树脂塑料工业]