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For: Lin F, Liu Y, Song L, Hao X, Liu X, Fan S, Wu Y, Mao L. Preparation of biaxially oriented polyamide 6/polyketone/graphene oxide films with enhanced barrier and mechanical behaviors. J Appl Polym Sci 2021. [DOI: 10.1002/app.50501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]

For:	Lin F, Liu Y, Song L, Hao X, Liu X, Fan S, Wu Y, Mao L. Preparation of biaxially oriented polyamide 6/polyketone/graphene oxide films with enhanced barrier and mechanical behaviors. J Appl Polym Sci 2021. [DOI: 10.1002/app.50501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]

Number

Cited by Other Article(s)

Gan D, Liu Y, Hu T, Fan S, Cui L, Liao G, Xie Z, Zhu X, Yang K. Pseudo-Eutectic of Isodimorphism to Design Biaxially-Oriented Bio-Based PA56/512 with High Strength, Toughness and Barrier Performances. Polymers (Basel) 2024;16:1176. [PMID: 38675095 PMCID: PMC11053481 DOI: 10.3390/polym16081176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/12/2024] [Accepted: 04/14/2024] [Indexed: 04/28/2024] Open

Abstract

The biaxially-oriented PA56/512 has excellent mechanical strength, extensibility and water-oxygen barrier properties and has broad application prospects in green packaging, lithium battery diaphragm and medical equipment materials. The correlation between the aggregation structure evolution and macroscopic comprehensive properties of copolymer PA56/512 under biaxial stretching has been demonstrated in this work. The structure of the random copolymerization sequence was characterized by 13C Nuclear magnetic resonance (NMR). The typical isodimorphism behavior of the co-crystallization system of PA56/512 and its BOPA-56/512 films was revealed by differential scanning calorimetry (DSC) and X-ray diffraction (XRD) tests. And the aggregation structure, including the hydrogen bond arrangement, crystal structure and crystal morphology of PA56/512 before and after biaxial stretching, was investigated by XRD, Fourier-transform infrared spectroscopy (FTIR) and polarized optical microscopy (POM) tests. Furthermore, the effect of the biaxially-oriented stretching process on the mechanical properties of PA56/512 has been demonstrated. In addition, a deep insight into the influence of the structure on the crystallization process and physical-mechanical performance has been presented. The lowest melting point at a 512 content of 60 mol% is regarded as a "eutectic" point of the isodimorphism system. Due to the high disorder of the structural units in the polymer chain, the transition degree of the folded chain (gauche conformation) is relatively lowest when it is straightened to form an extended chain (trans conformation) during biaxially-oriented stretching, and part of the folded chain can be retained. This explains why biaxially stretched PA56/512 has high strength, outstanding toughness and excellent barrier properties at the pseudo-eutectic point. In this study, using the unique multi-scale aggregation structure characteristics of a heterohomodymite polyamide at the pseudo-eutectic point, combined with the new material design scheme and the idea of biaxial-stretching processing, a new idea for customized design of high-performance multifunctional polyamide synthetic materials is provided.

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Affiliation(s)

Diansong Gan Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province, School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China; (D.G.); (S.F.); (L.C.); (G.L.); (Z.X.); (X.Z.) Zhuzhou Times Engineering Plastics Industrial Co., Ltd., Zhuzhou 412008, China;
Yuejun Liu Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province, School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China; (D.G.); (S.F.); (L.C.); (G.L.); (Z.X.); (X.Z.)
Tianhui Hu Zhuzhou Times Engineering Plastics Industrial Co., Ltd., Zhuzhou 412008, China;
Shuhong Fan Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province, School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China; (D.G.); (S.F.); (L.C.); (G.L.); (Z.X.); (X.Z.)
Lingna Cui Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province, School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China; (D.G.); (S.F.); (L.C.); (G.L.); (Z.X.); (X.Z.)
Guangkai Liao Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province, School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China; (D.G.); (S.F.); (L.C.); (G.L.); (Z.X.); (X.Z.)
Zhenyan Xie Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province, School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China; (D.G.); (S.F.); (L.C.); (G.L.); (Z.X.); (X.Z.)
Xiaoyu Zhu Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province, School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China; (D.G.); (S.F.); (L.C.); (G.L.); (Z.X.); (X.Z.)
Kejian Yang School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China

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Lin X, Wu Y, Fan S, Chen X, Liu Y, Liu X, Zheng W. Structural evolution and properties of polyamide‐6/poly(ether block amide) films during the simultaneous biaxial stretching. J Appl Polym Sci 2022. [DOI: 10.1002/app.52152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]