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      Effect of Annealing Temperature on PP Microporous Membranes Obtained by a Melt-Extrusion-Stretching Method

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          Abstract

          Isotactic polypropylene (iPP) precursor film with highly oriented lamellar structure was produced through a melt extrusion-annealing-uniaxial stretching (MAUS) process. The precursor films were annealed at various temperatures and the structure evolution of precursor films during various annealing temperatures and the pore formation of the annealed film during stretching were investigated. During annealing, recrystallized lamellar structure was formed to obtain “core-shell sandwich” structure. The thickness of newly formed lamellae increased with annealing temperature, which improved the ability of slipping resistance of the original lamellar structure during stretching. As the annealing temperature of precursor film increased, the micropore shape and diameter of the final membranes became more uniform. The porosity of the microporous membranes increased with increasing annealing temperature.

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          Most cited references 22

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          Regime III crystallization in polypropylene

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            Analysis of microporous membranes obtained from polypropylene films by stretching

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              Distribution of lamella thicknesses in isothermally crystallized polypropylene and polyethylene by differential scanning calorimetry

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                Author and article information

                Journal
                ipp
                International Polymer Processing
                Carl Hanser Verlag
                0930-777X
                2195-8602
                13 August 2019
                : 34
                : 4
                : 467-474
                Affiliations
                1 College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan, PRC
                2 State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan, PRC
                Author notes
                [* ] Correspondence address, Mail address: Zhengying Liu, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, Sichuan, PRC, E-mail: Liuzhying@ 123456scu.edu.com
                Article
                IPP3774
                10.3139/217.3774
                © 2019, Carl Hanser Verlag, Munich
                Page count
                References: 24, Pages: 8
                Product
                Self URI (journal page): http://www.hanser-elibrary.com/loi/ipp
                Categories
                Regular Contributed Articles

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