二氧化碳基塑料降解性能的研究

Study on the Degradation Property of Carbon Dioxide-based Plastics

[目的]研究二氧化碳基塑料的降解性能。[方法]以PPC为原料,通过生物降解、热氧化降解和光降解研究了PPC的降解性能。利用乌式粘度计测定了降解过程中PPC塑料的分子量变化;利用傅里叶变换红外光谱仪表征了降解过程中PPC的红外光谱特性。[结果]PPC薄膜在27℃恒温培养箱中生物降解15 d后,降解效果明显。180℃热氧化降解36 h,PPC塑料的分子量减少了63%。光氧化降解5 d后,PPC塑料的分子量减少了约85%。[结论]与生物降解相比,PPC塑料的热氧化和光降解程度更为明显。

[Objective] The research aimed to study the degradation property of carbon dioxide-based plastics.[Method] PPC as material,its degradation property was studied by biological,thermal-oxidative and photo degradation.Ubbelohde viscometer was used to measure molecular weight change of PPC in degradation process,and Fourier transform infrared spectroscopy was used to represent infrared spectral characteristics of PPC in degradation process.[Result] After bio-degradation for 15 d in 27 ℃ of constant-temperature incubator,the degradation effect of PPC plastics was significant.After thermal-oxidative degradation for 36 h at 180 ℃,the molecular weight of PPC decreased by 63％.After photodegradation for 5 d,the molecular weight of PPC decreased by 85％.[Conclusion] Compared with biological degradation,thermal oxidation and photo degradation degrees of PPC plastics were more significant.