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首页> 外文期刊>Journal of Applied Polymer Science >Nanomechanical Properties of Poly(trimethylene malonate) and Poly(trimethylene itaconate) During Hydrolytic Degradation
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Nanomechanical Properties of Poly(trimethylene malonate) and Poly(trimethylene itaconate) During Hydrolytic Degradation

机译：聚丙二酸三亚甲基酯和衣康酸聚三亚甲基酯的纳米力学性能

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摘要

The aim of this work was to evaluate surface mechanical properties of two bioplastics, poly(trimethylene malonate) (PTM) and poly(trimethylene itaconate) (PTI), during hydrolytic degradation. Renewable resource-based PTM and PTI were synthesized from 1,3-propanediol (PDO), malonic acid (MA), and itaconic acid (IA) via melt polycondensation. The hydrolytic degradation was performed in deionized (DI) water (pH 5.4) at room temperature. Morphology and surface mechanical properties at the nanoscale were monitored by atomic force microscopy (AFM) using a quantitative nanomechanical property mapping mode as a function of degradation time. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were used to show shifted phase transitions depending on the degradation. DSC studies showed hydrolytic degradation induced crystallinity for PTI. After degradation for one week, the degree of crystallinity had significantly increased, and the elastic modulus of PTI had decreased by 58%. PTM was found to be hygroscopic.
机译：这项工作的目的是评估两种生物塑料在水解降解过程中的表面力学性能，聚丙二酸丙二酸三丙酯和衣康酸聚三亚甲基衣康酸酯。通过熔融缩聚反应，由1,3-丙二醇（PDO），丙二酸（MA）和衣康酸（IA）合成了可再生资源基PTM和PTI。在室温下在去离子（DI）水（pH 5.4）中进行水解降解。纳米级的形貌和表面机械性能通过原子力显微镜（AFM）进行监控，使用定量的纳米机械性能映射模式作为降解时间的函数。差示扫描量热法（DSC）和热重分析（TGA）用于显示取决于降解的相移。 DSC研究表明，水解降解引起PTI结晶。降解一周后，结晶度显着提高，PTI的弹性模量下降了58％。发现PTM具有吸湿性。

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