可降解聚羟基乙酸低聚物改性聚酯的合成及其性能  

Synthesis and properties of biodegradable polyglycolic acid oligomer modified polyester

作　　者：靳琳琳 田俊凯 李家炜 戚栋明[1] 沈晓炜 邬春涛 JIN Linlin;TIAN Junkai;LI Jiawei;QI Dongming;SHEN Xiaowei;WU Chuntao(Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China;Zhejiang Satellite Petrochemical Co., Ltd., Jiaxing, Zhejiang 314000, China;Ningbo Municipal Bureau of Ecology and Environment, Ningbo, Zhejiang 315000, China)

机构地区：[1]浙江理工大学先进纺织材料与制备技术教育部重点实验室,浙江杭州310018 [2]浙江卫星石化股份有限公司,浙江嘉兴314000 [3]宁波市生态环境局,浙江宁波315000

出　　处：《纺织学报》2021年第1期16-21,共6页Journal of Textile Research

基　　金：浙江省重点研发计划项目(2020C01148);浙江省基础公益研究计划项目(LGG20E030006);国家级大学生创新创业训练计划项目(201910338007);浙江理工大学基本科研业务费专项资金资助项目(2019Q021)。

摘　　要：为改善芳香族聚酯(PET)的降解性能,采用可降解的聚羟基乙酸(PGA)低聚物,利用熔融缩聚和固相缩聚联用的工艺路线,对聚酯进行共聚改性合成聚对苯二甲酸乙二醇酯-co-聚乙醇酸共聚酯(PET-co-PGA)。借助核磁共振波谱仪、差示扫描量热仪、拉伸试验机、扫描电子显微镜和荧光显微镜等对共聚酯的结构、特征黏度、结晶行为、力学性能及降解性能进行表征与分析。结果表明:与纯PET相比,共聚改性破坏了PET-co-PGA的结构规整性,随着PGA质量分数的增加,共聚酯的熔点下降,结晶温度降低,结晶能力逐渐降低;在低PGA添加量时共聚酯具有更好的韧性,当PGA质量分数为5%时,共聚酯的断裂伸长率从13.1%增加至15.0%;改性后聚酯降解速率随着PGA质量分数增加而逐渐提升。In order to improve the degradation performance of aromatic poly(ethylene terephthalate)(PET),a novel polyethylene terephthalate-co-polyglycolic acid copolymer(PET-co-PGA)was synthesized by copolymerization modification of polyester with degradable polyglycolic acid(PGA)oligomer,through combining melt polycondensation and solid-phase polycondensation process.The structure,intrinsic viscosity,crytallization behavior and degradation property of the novel copolyester were characterized and analyzed by using nuclear magnetic resonance spectrometer,differential scanning calorimeter,tensile tester,scanning electron microscope and fluorescence microscope.The results show that the introduction of PGA damages the regularity of PET and results in the decrease of the melting point,crystallization temperature and crystallization ability.The tensile experiments show that the synthesized copolyester with the low volume of addition of PGA has better tenacity compared with pure PET.When 5%PGA is added,the elongation at the break of the copolyester is increased from 13.1%to 15.0%.The degradation rate of pre-modified PET gradually increases with the amount of PGA added.

关 键 词：改性聚酯 聚羟基乙酸 聚对苯二甲酸乙二醇酯 共聚改性 熔融缩聚 固相缩聚 

分 类 号：TS193.5[轻工技术与工程—纺织化学与染整工程]