Crystallization behavior of polyvinyl alcohol with inorganic nucleating agent talc and regulation mechanism analysis

Journal of Polymers and the Environment - Tập 30 - Trang 3163-3173 - 2022
Ruru Huang1, Yane Zhang1, Aimin Xiang1, Songbai Ma2, Huafeng Tian1, Yuge Ouyang1, A. Varada Rajulu3
1Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, School of Chemical and Material Engineering, Beijing Technology and Business University, Beijing, China
2School of E-Business and Logistics, Beijing Technology and Business University, Beijing, China
3Centre for Composite Materials, International Research Centre, Kalasalingam University, Krishnankoil, India

Tóm tắt

Scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD) were used to study the effect of talc on the crystallization properties and morphology of PVA/talc composite films from the perspective of heterogeneous nucleation effect. The Mo Zhishen equation and Avrami equation were used to study the crystallization kinetics behavior, and successive self-nucleation annealing (SSA) method was used to analyze the wafer thickness at various melting temperatures. PVA films were prepared by flow-casting method, and talc was added as inorganic nucleating agent to improve the crystallinity of PVA. The results show that the addition of talc to the PVA film promotes its crystallization, and as the content of the nucleating agent increases, the crystallinity tends to increase. Due to the increase of nucleation point, the proportion of thinner wafers increases, and the gap of wafer thickness becomes smaller, and the wafer thickness becomes uniform. These results show that talc regulates the crystallization of PVA, improves the crystallinity and crystallization rate of PVA. Talc has heterogeneous nucleation effect on PVA films.

Tài liệu tham khảo

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