摘要
对聚(L-丙交酯-co-ε-己内酯)(PLCA)系列共聚物的力学性能及体外降解性能进行了系统的研究。研究表明:随着PLCA共聚物组分中己内酯含量的增加,其拉伸强度从61.80MPa下降到16.10MPa,断裂伸长率从21.83%增加到695.69%,且PLCA样品表现出不同的拉伸应变行为。PLCA共聚物组分中己内酯含量越高,降解速度越快。在体外降解过程中,样品自身缺陷、摩尔质量降低、结晶度变化等因素造成PLCA样品的拉伸强度产生了变化。断裂伸长率的减小表明PLCA样品在降解过程中是逐渐变脆的。
A series of poly（L-lactide-co-ε-caprolactone）（PLCA）copolymers were synthesized and their mechanical properties and vitro degradable behaviors were investigated in details.The results showed that with caproylactone content increasing,the tensile strength of PLCA decreased from 61.80 MPa to 16.10 MPa gradually;and the elongation at break increased from 21.83% to 695.69%.PLCA copolymers exhibited different tensile stress-strain behaviors.In vitro degradation results indicated that PLCA copolymers degraded faster with the increasing content of caproylactone.During vitro degradation process,the tensile strength of PLCA copolymers changed due to the defects,molecular weight loss and change in degree of crystallinity.And the declination in elongation at break indicated that PLCA copolymers became brittle gradually.
出处
《塑料工业》
CAS
CSCD
北大核心
2010年第8期34-38,共5页
China Plastics Industry
基金
中国科学院"西部之光"人才培养计划资助项目
