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  • ISSN 1006-3080
  • CN 31-1691/TQ

等温退火对PLLGA85/15结晶度、力学性能和降解性能的影响

赵娜 李庆 陈栋梁 马志刚

赵娜, 李庆, 陈栋梁, 马志刚. 等温退火对PLLGA85/15结晶度、力学性能和降解性能的影响[J]. 华东理工大学学报(自然科学版), 2017, (6): 784-792. doi: 10.14135/j.cnki.1006-3080.2017.06.006
引用本文: 赵娜, 李庆, 陈栋梁, 马志刚. 等温退火对PLLGA85/15结晶度、力学性能和降解性能的影响[J]. 华东理工大学学报(自然科学版), 2017, (6): 784-792. doi: 10.14135/j.cnki.1006-3080.2017.06.006
ZHAO Na, LI Qing, CHEN Dong-liang, MA Zhi-gang. Effect of Isothermal Annealing on Degree of Crystallinity,Mechanical Properties and Degradation Behavior of PLLGA85/15[J]. Journal of East China University of Science and Technology, 2017, (6): 784-792. doi: 10.14135/j.cnki.1006-3080.2017.06.006
Citation: ZHAO Na, LI Qing, CHEN Dong-liang, MA Zhi-gang. Effect of Isothermal Annealing on Degree of Crystallinity,Mechanical Properties and Degradation Behavior of PLLGA85/15[J]. Journal of East China University of Science and Technology, 2017, (6): 784-792. doi: 10.14135/j.cnki.1006-3080.2017.06.006

等温退火对PLLGA85/15结晶度、力学性能和降解性能的影响

doi: 10.14135/j.cnki.1006-3080.2017.06.006
基金项目: 

湖北省自然科学基金项目面上项目(2012FFC020);湖北省教育厅科研计划项目指导性项目(B20123004);湖北理工学院校级科学研究项目(11yjz03R)

Effect of Isothermal Annealing on Degree of Crystallinity,Mechanical Properties and Degradation Behavior of PLLGA85/15

  • 摘要: 研究了等温退火对左旋乳酸乙醇酸无规共聚物(PLLGA85/15)结晶度、力学性能和降解性能的影响。在最佳退火温度130℃时对材料进行退火操作。采用X射线衍射仪(XRD)考察了退火后材料的结晶情况,同时用万能力学试验机测试了材料的力学性能,并且研究了不同的退火时间对材料结晶度和力学性能的影响。对不同退火时间的PLLGA85/15材料进行降解实验,考察了材料降解过程中样品吸水率、失重率和降解液pH的变化。用凝胶渗透色谱仪(GPC)考察了降解后样品的分子量变化,用差示扫描量热分析仪(DSC)考察了材料降解后热力学性能的变化,用扫描电镜(SEM)观察了降解后样品的微观形貌变化。实验结果表明,随退火时间延长,材料结晶度和强度提高,至最大值后结晶度和强度保持不变;长时间的等温退火过程会导致材料的热降解,使分子量降低,从而导致材料的降解速率加快;而短时间的退火使材料结晶度提高,同时降解速率减缓。

     

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出版历程
  • 收稿日期:  2017-02-23
  • 刊出日期:  2017-12-28

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