【摘要】 采用不同官能团如苯二甲酸(TA)、聚乙二醇(PEG,Mn=1000)对聚丁二酸丁二醇酯(PBS)主链进行共聚改性,得到了基于PBS的均聚共聚物PBST;嵌段共聚物PBES。利用1H-NMR、GPC、WXRD、热分析、拉力试验对共聚物的化学结构、相对分子质量、结晶性、热性能及力学性质的影响进行了研究。结果表明:将TA、PEG引入PBS的主链,在较短时间内得到了数均分子质量约5万的无规PBST和嵌段PBES共聚物;PEG的介入使聚合物的结晶度降低、断裂伸长率大幅度增加,最大达846.4%;TA的介入则使其结晶度增加,断裂伸长率呈逐渐减小的趋势,但仍比PBS有所增大;两种聚合物均有良好的热稳定性。更多还原

【Abstract】 Using different functional groups such as terephthalic acid(TA) and polyethylene glycol(PEG) were used to modify the biodegradable materials polymer poly(butylene-succinate)(PBS),a series of copolymer based on PBS,such as PBST,PBES were synthesized.By 1H-NMR,GPC,thermal analysis,tensile testing and WXRD,the chemical structure,molecular weight,crystalline,thermal and mechanical properties were analyzed.The results showed that introducing the TA,PEG into the molecular main chain of PBS could get such copolymers of a higher molecular weight above 5.0×104 within a short time.The adding of PEG could make the crystalline of copolymers decrease,but the elongation increase so much,and the longest could achieve 846.4%.The TA in the copolymer increased the crystalline of the copolymers and the elongation presented the trend of decline,but comparing with PBS,it still increased.Both of the copolymers all had the good stability of thermal.更多还原