摘要
利用熔融共混制备聚丁二酸丁二酯(PBS)/聚己内酯(PCL)共混物,并通过固相拉伸处理纯PBS及不同配比的PBS/PCL共混物,采用扫描电子显微镜、差示扫描量热仪、热分析仪、万能试验机及薄膜渗透仪等测试了固相拉伸前后纯PBS及一系列PBS/PCL共混物的断面形貌、结晶性能、热稳定性、力学和氧气阻隔性能。结果表明,固相拉伸前,纯PBS和PCL质量分数为10%的PBS/PCL共混物断面呈现韧性断裂形态,固相拉伸后的纯PBS及PBS/PCL共混物的断面呈现出显著的取向结构;固相拉伸后,纯PBS和共混物的结晶度、拉伸屈服强度和拉伸弹性模量均明显提高,氧气透过系数和初始热分解温度降低,断裂伸长率则显著降低。同时,与未固相拉伸的PCL质量分数为10%的PBS/PCL共混物相比,固相拉伸后,PCL质量分数为10%,15%,20%的PBS/PCL共混物的结晶度分别提高了13.11%,15.99%和13.03%,拉伸屈服强度分别提高了206.2%,188.5%和151.3%,拉伸弹性模量分别提高了62.3%,45.9%和33.2%,且氧气透过系数分别下降了20.8%,28.3%和34.9%。
Polybutylene succinate(PBS)/polycaprolactone(PCL)blends were prepared by melt-blending,and pure PBS and PBS/PCL blends with different component ratios were further processed by solid-stretching.And then,morphology,crystallization,thermal stability,mechanical and oxygen barrier properties of the pure PBS and a series of PBS/PCL blends before and after solid-stretching were tested by scanning electron microscope,differential scanning calorimeter,thermal analyzer,universal testing machine and film permeation meter.The results show that before solid-stretching,the fracture sections of pure PBS and PBS/PCL blend with 10wt%PCL show ductile fracture morphology,while the fracture sections of pure PBS and PBS/PCL blends after solid-stretching show significant orientation structure.After solid-stretching,the crystallinity,tensile yield strength and tensile modulus of pure PBS and PBS/PCL blends increase distinctly,oxygen permeability coefficient and initial thermal decomposition temperature decrease,elongation at break decrease significantly.Compared with the PBS/PCL blend with 10wt%PCL and without solid-stretching,the crystallinity of the PBS/PCL blend containing 10wt%,15wt%,20wt%PCL after solid-stretching increase by 13.11%,15.99%and 13.03%,and their tensile yield strength increase by 206.2%,188.5%and 151.3%,tensile modulus increase by 62.3%,45.9%and 33.2%,oxygen permeability coefficient decrease by 20.8%,28.3%and 34.9%,respectively.
作者
朱艳
丁镠
童婷
付蕾
Zhu Yan;Ding Liu;Tong Ting;Fu Lei(School of Materials Science and Engineering,National&Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology,Shaanxi University of Technology,Hanzhong 723000,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2020年第10期1-6,23,共7页
Engineering Plastics Application
基金
国家自然科学基金项目(51703121)。
关键词
聚丁二酸丁二酯
聚己内酯
固相拉伸
结晶
力学性能
氧气透过系数
poly(butylene succinate)
polycaprolactone
solid stretching
crystallization
mechanical property
oxygen permeability coefficient
