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Constructing highly oriented and condensed shish-kebab crystalline structure of HDPE/UHMWPE blends via intense stretching process：Achieving high mechanical properties and in-plane thermal conductivity. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124532] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Takazawa A, Kakiage M, Yamanobe T, Uehara H, Shimizu Y, Ohnishi T, Wakabayashi Y, Inatomi K, Abe S, Aoyama K. Effect of blending small amount of high-density polyethylene on molecular entanglements during melt-drawing of ultrahigh-molecular-weight polyethylene. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kida T, Kimura T, Eno A, Janchai K, Yamaguchi M, Otsuki Y, Kimura T, Mizukawa T, Murakami T, Hato K, Okawa T. Effect of Ultra-High-Molecular-Weight Molecular Chains on the Morphology, Crystallization, and Mechanical Properties of Polypropylene. Polymers (Basel) 2021; 13:4222. [PMID: 34883725 PMCID: PMC8659738 DOI: 10.3390/polym13234222] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 11/25/2021] [Accepted: 11/27/2021] [Indexed: 01/01/2023] Open
Abstract
The effects of the ultra-high-molecular-weight (UHMW) component of polypropylene (PP) on its rheological properties, crystallization behavior, and solid-state mechanical properties were investigated using various measurement techniques. The terminal relaxation time-determined by measuring the linear viscoelasticity-was increased by adding the UHMW component. The increase in the melt elasticity produced by adding the UHMW component was observed by measuring the steady-state shear flow, although the shear viscosity was not greatly affected. Owing to the long characteristic time of the Rouse relaxation of the UHMW component, PP with the UHMW component formed highly oriented structures through a shear-induced crystallization process. The addition of the UHMW component enhanced the orientation and regularity of crystalline structure for extruded films. Therefore, the Young's modulus, yield stress, and strength were higher in the PP film containing the UHMW component than in one without the UHMW component, irrespective of the direction of tensile deformation.
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Affiliation(s)
- Takumitsu Kida
- Japan Advanced Institute of Science and Technology, School of Materials Science, 1-1 Asahidai, Nomi 9231292, Japan; (T.K.); (A.E.); (K.J.); (M.Y.)
| | - Takeyoshi Kimura
- Japan Advanced Institute of Science and Technology, School of Materials Science, 1-1 Asahidai, Nomi 9231292, Japan; (T.K.); (A.E.); (K.J.); (M.Y.)
| | - Ayaka Eno
- Japan Advanced Institute of Science and Technology, School of Materials Science, 1-1 Asahidai, Nomi 9231292, Japan; (T.K.); (A.E.); (K.J.); (M.Y.)
| | - Khunanya Janchai
- Japan Advanced Institute of Science and Technology, School of Materials Science, 1-1 Asahidai, Nomi 9231292, Japan; (T.K.); (A.E.); (K.J.); (M.Y.)
- Petrochemical and Polymer Science, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand
| | - Masayuki Yamaguchi
- Japan Advanced Institute of Science and Technology, School of Materials Science, 1-1 Asahidai, Nomi 9231292, Japan; (T.K.); (A.E.); (K.J.); (M.Y.)
| | - Yasuhiko Otsuki
- Packaging and Industrial Materials Laboratory, Prime Polymer Co., Ltd., 3 Chigusa-Kaigan, Ichihara 2990108, Japan; (Y.O.); (T.K.); (T.M.); (T.M.); (K.H.); (T.O.)
| | - Tokutaro Kimura
- Packaging and Industrial Materials Laboratory, Prime Polymer Co., Ltd., 3 Chigusa-Kaigan, Ichihara 2990108, Japan; (Y.O.); (T.K.); (T.M.); (T.M.); (K.H.); (T.O.)
| | - Tomoaki Mizukawa
- Packaging and Industrial Materials Laboratory, Prime Polymer Co., Ltd., 3 Chigusa-Kaigan, Ichihara 2990108, Japan; (Y.O.); (T.K.); (T.M.); (T.M.); (K.H.); (T.O.)
| | - Tomoya Murakami
- Packaging and Industrial Materials Laboratory, Prime Polymer Co., Ltd., 3 Chigusa-Kaigan, Ichihara 2990108, Japan; (Y.O.); (T.K.); (T.M.); (T.M.); (K.H.); (T.O.)
| | - Kazuki Hato
- Packaging and Industrial Materials Laboratory, Prime Polymer Co., Ltd., 3 Chigusa-Kaigan, Ichihara 2990108, Japan; (Y.O.); (T.K.); (T.M.); (T.M.); (K.H.); (T.O.)
| | - Tomoya Okawa
- Packaging and Industrial Materials Laboratory, Prime Polymer Co., Ltd., 3 Chigusa-Kaigan, Ichihara 2990108, Japan; (Y.O.); (T.K.); (T.M.); (T.M.); (K.H.); (T.O.)
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Slouf M, Krajenta J, Gajdosova V, Pawlak A. Macromechanical and micromechanical properties of polymers with reduced density of entanglements. POLYM ENG SCI 2021. [DOI: 10.1002/pen.25699] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Miroslav Slouf
- Institute of Macromolecular Chemistry, Czech Academy of Sciences Prague 6 Czech Republic
| | - Justyna Krajenta
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences Lodz Poland
| | - Veronika Gajdosova
- Institute of Macromolecular Chemistry, Czech Academy of Sciences Prague 6 Czech Republic
| | - Andrzej Pawlak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences Lodz Poland
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