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New potentially biodegradable polyurethanes

机译：新型潜在可生物降解的聚氨酯

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New potentially biodegradable, thermoplastic multiblock copolymers from poly(lactic acid), poly (ε-caprolactone) and/or poly(lactic acid-ε-caprolactone) copolymers were synthesized using toluene diisocyanate (TDI) as chain extender and poly(ethylene glycol) as intrinsic plasticizer. The structures of the resulting copolymers were unambiguously confirmed by NMR, IR and matrix assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS) methods. The effects of the molar ratio of the polymers to TDI on the molar mass and on the mechanical properties of the resulting multiblock copolymers were also investigated. The mechanical properties such as tensile strength, Young's modulus, Shore A hardness and elongation at break of the multiblock copolymers suitable for making foils are compared with those of some relevant commercially available plastics. According to the comparative mechanical tests, some mechanical properties of the new biodegradable copolymers exceed those of the conventional plastics.
机译：使用甲苯二异氰酸酯（TDI）作为增链剂和聚乙二醇合成了由聚乳酸，聚ε-己内酯和/或聚乳酸-ε-己内酯共聚物组成的新型潜在可生物降解的热塑性多嵌段共聚物作为固有的增塑剂。所得共聚物的结构通过NMR，IR和基质辅助激光解吸电离飞行时间质谱（MALDI-TOF MS）方法明确证实。还研究了聚合物与TDI的摩尔比对摩尔质量和所得多嵌段共聚物的机械性能的影响。将适用于制造箔的多嵌段共聚物的机械性能，例如拉伸强度，杨氏模量，肖氏A硬度和断裂伸长率与一些相关的市售塑料进行了比较。根据比较的机械测试，新型可生物降解共聚物的某些机械性能超过了常规塑料的机械性能。

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