PPC/PBAT生物降解材料热性能和力学性能的研究

Research on Thermal and Mechanical Properties of PPC/PBAT Biodegradable Material

采用聚对苯二甲酸丁二醇酯-己二酸丁二醇酯(PBAT)对聚甲基乙撑碳酸酯(PPC)进行共混改性,对共混物进行了性能分析,并对PPC纯料与纤维素进行受控堆肥条件下最终需氧生物分解和崩解能力测试。结果表明:相同时间内PPC的生物分解速率要低于纤维素的生物分解速率;120 d内纤维素最大生物分解率为90%,PPC最大生物分解率约为63%;当PBAT的加入量为20%时,PPC的玻璃化转变温度提高3.55℃,失重率5%、50%和90%时的温度分别最高提高3.61℃、42.73℃和70.21℃;当PBAT含量为40%时,共混片材的拉伸强度最高提高了236.4%。

Poly（propylene carbonate）（PPC） was melting blended with Poly（butylene adipate-co-terephthalate）（PBAT）.The blends were tested using DSC,TG and tensile property test.Ultimate aerobic biodegradability and disintegration ability of PPC and cellulose under controlled composting conditions were tested.It is found out that within the same time the biodegradation rate is lower than that of cellulose;the maximum biodegradation ratio of cellulose is 90% while PPC has a ratio of 63% in 120 d;glass transition temperature of PPC is improved by 3.55℃ with 20% content of PBAT and temperatures of weight loss ratio at 5%,50% and 90% are respectively improved by 3.61℃,42.73℃ and 70.21℃;the tensile strength of the blend is improved by 236.4% with 40% content of PBAT.