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以丁二酸、L-乳酸、对苯二甲酸等二元酸和丁二醇、乙二醇等二元醇为原料,通过熔融缩聚法直接合成了一种聚丁二酸丁二醇酯(PBS)类的脂肪族生物可降解聚合物。介绍了该聚合物的聚合工艺,并对其进行了力学性能测试和扫描电子显微镜分析。结果表明,这种聚合物具有一种独特的力学性能,在断裂伸长率为450%时典型的应力-应变橡胶平台曲线上,分别在断裂伸长率为10%和300%处出现典型的屈服应力,第二个屈服应力的存在使得该聚合物有极好的强度、柔韧性、记忆性和回弹性,它的高强高韧性能使其可用作脆性降解材料(如聚乳酸)的优良改性材料。
The succinic acid, L-lactic acid, terephthalic acid and other dibasic acids and butanediol, ethylene glycol and other diols as raw materials, by melt polycondensation directly synthesized a polybutylene succinate ( PBS) class of aliphatic biodegradable polymers. The polymerization process of the polymer was introduced, and its mechanical properties and scanning electron microscopy were also studied. The results show that this polymer possesses a unique mechanical property, typical at a stress-strain rubber platform curve with an elongation at break of 450%, typical at elongation at break of 10% and 300% respectively Yield stress, the presence of a second yield stress, gives the polymer excellent strength, flexibility, memory and resilience. Its high strength and high toughness make it useful as a brittle degradable material, such as polylactic acid Modified materials.