The cavitation development of poly(4‐methyl‐1‐pentene) casting films studied by in situ small angle X‐ray scattering. Issue 15 (11th November 2020)

• Record Type: Journal Article
• Authors: Xu, Liyang; Jiang, Yuanping; Wang, Dezheng; Yin, Bo
• Is Part Of: Journal of applied polymer science. Volume 138:Issue 15(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-11-11
• Subjects: films -- membranes -- morphology -- porous materials; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.50209
• Languages: English
• ISSNs: 0021-8995

Abstract

Abstract: In this paper, the on‐line small angle X‐ray scattering/wide‐angle X‐ray scattering (SAXS/WAXS) characterization method was adopted to study the morphology evolution of poly(4‐methyl‐1‐pentene) casting films during stretching. In this process, the lamellae structure was destroyed. And "bridge structure" was generated in the amorphous region. The scattering pattern changed obviously before and after cavities orientation. Stretching temperature and stretching speed mattered for the size of micropores. Low temperature helped generate more and larger voids. The faster stretching speed can improve the generation of cavities, enlarged cavitation number and helped its reorientation. These results provide the basic knowledge of how to produce poly(4‐methyl‐1‐pentene) microporous membranes with high electrochemical performance. Abstract : Figure 1 Schematic representation of the development of voids in the interlamellar region and the accompanying SAXS patterns during tensile deformation of TPX. The approximate macroscopic strain is given and the stress is applied in the vertical direction.