Porous-structured vermiculite/polybutylene adipate terephthalate composite films: The morphology, mechanical properties, and nonisothermal degradation kinetics,Polymer Composites

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Porous-structured vermiculite/polybutylene adipate terephthalate composite films: The morphology, mechanical properties, and nonisothermal degradation kinetics
Polymer Composites ( IF 4.8 ) Pub Date : 2024-01-10 , DOI: 10.1002/pc.28079
Yuhuan Xu ₁ , Teng Zhou ₁ , Xiaoyu Shang ₁ , Daohai Zhang _{1,

2,

3} , Xiaonan Liu ₄ , Qin Shuhao _{1,

2}

Affiliation

To examine the impact of vermiculite (VMT) on the environmental and physical aspects of polybutylene terephthalate (PBAT), the thermal degradation behavior of VMT/polybutylene terephthalate polyadipate (VMT/PBAT) composite films was investigated by using the thermogravimetric analysis (TGA). To ensure precise calculation of the specific activation energy values of VMT/PBAT composite films in thermal degradation performance experiments, the Kissinger method (K-method) and Flynn–Wall–Ozawa method (FWO method) were utilized. Additionally, the reaction mechanism was analyzed using the Coats–Redfern equation (CR equation). The introduction of VMT into the PBAT co-polyester structure leads to an increase in the thermal degradation activation energy E_k of composite films.; the apparent activation energies were calculated by the Coats–Redfern method for different reaction mechanisms, and the interfacial diffusion reaction mechanism of the composite film was determined, with a thermal degradation reaction principle properties of g(α) = [1 − (1 − α)]² and the number of reaction steps of 2.

中文翻译：

多孔结构蛭石/聚己二酸对苯二甲酸丁二醇酯复合膜：形貌、力学性能和非等温降解动力学

为了研究蛭石（VMT）对聚对苯二甲酸丁二醇酯（PBAT）环境和物理方面的影响，通过热重分析（TGA）研究了VMT/聚对苯二甲酸丁二醇酯聚己二酸酯（VMT/PBAT）复合薄膜的热降解行为。为了确保热降解性能实验中VMT/PBAT复合膜的比活化能值的精确计算，采用了Kissinger法（K法）和Flynn-Wall-Ozawa法（FWO法）。此外，使用Coats-Redfern方程（CR方程）分析了反应机理。在PBAT共聚酯结构中引入VMT导致复合薄膜的热降解活化能E _k增加；采用Coats-Redfern方法计算不同反应机理的表观活化能，确定复合膜的界面扩散反应机理，热降解反应原理为g ( α ) = [1 − (1 − α )] ²，反应步骤数为2。

更新日期：2024-01-10

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