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首页> 外文期刊>Polymers for advanced technologies >Ultraviolet-induced crosslinking of poly(butylene succinate) and its thermal property, dynamic mechanical property, and biodegradability
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Ultraviolet-induced crosslinking of poly(butylene succinate) and its thermal property, dynamic mechanical property, and biodegradability

机译：紫外线诱导的聚丁二酸丁二醇酯的交联及其热性能，动态力学性能和生物降解性

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摘要

Crosslinking is an effective way to improve polymer properties. This paper focuses on ultraviolet-induced crosslinking of poly(butylene succinate) (PBS) in the presence of a photoinitiator and a crosslinking agent at ambient temperature. The effects of the concentration of photoinitiator, the crosslinking agent content, and the irradiation time on the crosslink behavior were investigated. To obtain an appropriate gel fraction in different irradiation times, 3.0 wt% of photoinitiator and 10.0 wt% of crosslinking agent were proved to be the optimum choice. Furthermore, properties such as thermal properties, dynamic mechanical property, and enzymatic degradation of PBS before and after crosslinking were examined. Differential scanning calorimetry (DSC) analysis revealed that glass transition temperature (T_g) increased with increase in gel fraction, while melting temperature (T_m) and the degree of crystallinity decreased. This may be caused by the reduced molecular chain mobility and inhibited molecular motion for crystallization in crosslinked samples. The crosslinked polymer also showed improved thermal stability and dynamic mechanical property. In addition, the introduction of crosslinking retarded the enzymatic degradation rate of PBS, but it was still biodegradable. The improved properties of crosslinked PBS will extend the application of PBS.
机译：交联是改善聚合物性能的有效方法。本文主要研究在环境温度下，在光引发剂和交联剂存在下，紫外线诱导的聚丁二酸丁二酯（PBS）的交联。研究了光引发剂浓度，交联剂含量和辐照时间对交联行为的影响。为了在不同的照射时间下获得合适的凝胶分数，证明了3.0wt％的光引发剂和10.0wt％的交联剂是最佳选择。此外，检查了诸如热性能，动态机械性能以及在交联之前和之后PBS的酶促降解的性质。差示扫描量热法（DSC）分析表明，玻璃化转变温度（T_g）随着凝胶分数的增加而增加，而熔融温度（T_m）和结晶度降低。这可能是由于交联样品中分子链迁移率降低和分子运动受阻所致。交联的聚合物还显示出改善的热稳定性和动态机械性能。另外，交联的引入阻碍了PBS的酶促降解速率，但是仍然是可生物降解的。交联的PBS性能的改善将扩展PBS的应用。

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