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Du C, Zhang Y, Lin J, Fan G, Zhou C, Yu Y. Flexible Positive Temperature Coefficient Composites (PVAc/EVA/GP-CNF) with Room Temperature Curie Point. Polymers (Basel) 2024; 16:2028. [PMID: 39065344 PMCID: PMC11280720 DOI: 10.3390/polym16142028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2024] [Revised: 06/27/2024] [Accepted: 07/02/2024] [Indexed: 07/28/2024] Open
Abstract
Polymeric positive temperature coefficient (PTC) materials with low switching temperature points are crucial for numerous electronic devices, which typically function within the room temperature range (0-40 °C). Ideal polymeric PTC materials for flexible electronic thermal control should possess a room-temperature switching temperature, low room-temperature resistivity, exceptional mechanical flexibility, and adaptive thermal control properties. In this study, a novel PTC material with a room-temperature switching temperature and superb mechanical properties has been designed. A blend of a semi-crystalline polymer EVA with a low melting temperature (Tm) and an amorphous polymer (PVAc) with a low glass transition temperature (Tg) was prepared. Low-cost graphite was chosen as the conductive filler, while CNF was incorporated as a hybrid filler to enhance the material's heating stability. PVAc0.4/EVA0.6/GP-3wt.% CNF exhibited the lowest room temperature resistivity, and its PTC strength (1.1) was comparable to that without CNF addition, with a Curie temperature of 29.4 °C. Room temperature Joule heating tests revealed that PVAc0.4/EVA0.6/GP-3wt.% CNF achieved an equilibrium temperature of approximately 42 °C at 25 V, with a heating power of 3.04 W and a power density of 3.04 W/cm2. The Young's modulus of PVAc0.4/EVA0.6/GP-3wt.% CNF was 9.24 MPa, and the toughness value was 1.68 MJ/m3, indicating that the elasticity and toughness of the composites were enhanced after mixing the fillers, and the mechanical properties of the composites were improved by blending graphite with CNF.
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Affiliation(s)
- Chao Du
- Union Hospital Tongji Medical College and School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yangyang Zhang
- Henan Key Laboratory of Nanocomposites and Applications, Huanghe Science and Technology College, Zhengzhou 450061, China
| | - Jiangmin Lin
- Union Hospital Tongji Medical College and School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Guotao Fan
- Union Hospital Tongji Medical College and School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Can Zhou
- Union Hospital Tongji Medical College and School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yan Yu
- Union Hospital Tongji Medical College and School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan 430074, China
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2
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Polymer positive temperature coefficient composites with room-temperature Curie point and superior flexibility for self-regulating heating devices. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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3
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High-Precision Thin Wall Bipolar Plates for Fuel Cell Applications via Injection Compression Molding with Dynamic Mold Temperature Control. Polymers (Basel) 2022; 14:polym14142799. [PMID: 35890575 PMCID: PMC9318047 DOI: 10.3390/polym14142799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/05/2022] [Accepted: 07/07/2022] [Indexed: 11/17/2022] Open
Abstract
In recent years, the demand for polymer compound solutions for the application of bipolar plates in polymer electrolyte membrane fuel cells (PEMFC) has increased continuously due to significant cost and lifetime advantages compared to metallic solutions. The main challenge of the compounds is the high filler content required to ensure sufficient electrical conductivity of the bipolar plates. The associated increase in viscosity and simultaneously increased thermal conductivity limit the conventional injection molding process in terms of achievable flow path length to wall thickness ratios (plate aspect ratio). In order to evaluate the extent to which highly modified electrically conductive polymer material systems can be processed into thin-walled and highly dimensionally stable bipolar plates, an injection compression molding process with dynamic mold temperature control (ICM-DT) has been developed. For this purpose, a compound was prepared from polypropylene (PP) and graphite-flakes. The compound was characterized with respect to the achieved filler content, the electrical conductivity, as well as the pressure- and temperature-dependent solidification range. The ICM-DT experiments were carried out by varying the maximum mold temperature and the compression force. In addition, the process was designed with multiple compression and decompression steps to account for a possible pressure-dependent solidification of the compound. The plates were characterized with respect to the achieved plate aspect ratio and the flow-path-dependent dimensional thickness stability. It was shown that the plate aspect ratio could be increased by up to 125% with the maximum filler content compared to conventional injection molding processes provided in the literature. With the multi-stage ICM-DT process, it was also possible to optimize the thickness dimensional stability with a maximum deviation of 3% over the flow path.
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4
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Sit S, Chakraborty G, Das NC. Superior
EMI
shielding effectiveness with enhanced electrical conductivity at low percolation threshold of flexible novel ethylene methyl acrylate/single‐walled carbon nanotube nanocomposites. POLYM ENG SCI 2022. [DOI: 10.1002/pen.25987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Subhashis Sit
- Department of Mechanical Engineering Indian Institute of Technology Kharagpur Kharagpur India
| | - Goutam Chakraborty
- Department of Mechanical Engineering Indian Institute of Technology Kharagpur Kharagpur India
| | - Narayan Chandra Das
- Rubber Technology Centre Indian Institute of Technology Kharagpur Kharagpur India
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5
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Wei Y, Zhou H, Deng H, Ji W, Tian K, Ma Z, Zhang K, Fu Q. "Toolbox" for the Processing of Functional Polymer Composites. NANO-MICRO LETTERS 2021; 14:35. [PMID: 34918192 PMCID: PMC8677876 DOI: 10.1007/s40820-021-00774-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 11/17/2021] [Indexed: 05/31/2023]
Abstract
UNLABELLED The processing methods of functional polymer composites (FPCs) are systematically summarized in “Toolbox”. The relationship of processing method-structure-property is discussed and the selection and combination of tools in processing among different FPCs are analyzed. A promising prospect is provided regarding the design principle for high performance FPCs for further investigation. ABSTRACT Functional polymer composites (FPCs) have attracted increasing attention in recent decades due to their great potential in delivering a wide range of functionalities. These functionalities are largely determined by functional fillers and their network morphology in polymer matrix. In recent years, a large number of studies on morphology control and interfacial modification have been reported, where numerous preparation methods and exciting performance of FPCs have been reported. Despite the fact that these FPCs have many similarities because they are all consisting of functional inorganic fillers and polymer matrices, review on the overall progress of FPCs is still missing, and especially the overall processing strategy for these composites is urgently needed. Herein, a “Toolbox” for the processing of FPCs is proposed to summarize and analyze the overall processing strategies and corresponding morphology evolution for FPCs. From this perspective, the morphological control methods already utilized for various FPCs are systematically reviewed, so that guidelines or even predictions on the processing strategies of various FPCs as well as multi-functional polymer composites could be given. This review should be able to provide interesting insights for the field of FPCs and boost future intelligent design of various FPCs. [Image: see text] SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s40820-021-00774-5.
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Affiliation(s)
- Yun Wei
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Hongju Zhou
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Hua Deng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China.
| | - Wenjing Ji
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Ke Tian
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Zhuyu Ma
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Kaiyi Zhang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Qiang Fu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
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6
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Lei C, Xie Z, Wu K, Fu Q. Controlled Vertically Aligned Structures in Polymer Composites: Natural Inspiration, Structural Processing, and Functional Application. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2103495. [PMID: 34590751 DOI: 10.1002/adma.202103495] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 07/08/2021] [Indexed: 05/23/2023]
Abstract
Vertically aligned structures, which are a series of characteristic conformations with thickness-direction alignment, interconnection, or assembly of filler in polymeric composite materials that can provide remarkable structural performance and advanced anisotropic functions, have attracted considerable attention in recent years. The past two decades have witnessed extensive development with regard to universal fabrication methods, subtle control of morphological features, improvement of functional properties, and superior applications of vertically aligned structures in various fields. However, a systematic review remains to be attempted. The various configurations of vertical structures inspired from biological samples in nature, such as vertically aligned structures with honeycomb, reed, annual ring, radial, and lamellar configurations are summarized here. Additionally, relevant processing methods, which include the transformation of oriented direction, external-field inducement, template method, and 3D printing method, are discussed in detail. The diverse applications in mechanical, thermal, electric, dielectric, electromagnetic, water treatment, and energy fields are also highlighted by providing representative examples. Finally, future opportunities and prospects are listed to identify current issues and potential research directions. It is expected that perspectives on the vertically aligned structures presented here will contribute to the research on advanced multifunctional composites.
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Affiliation(s)
- Chuxin Lei
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Zilong Xie
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Kai Wu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Qiang Fu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
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7
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Huang Y, Chen L, Zheng S, Wu X, Liu L, Ke K, Liu Z, Yang W, Yang M. A new insight into multi-tier structure tailoring: Synchronous utilization of particle migration and incompatible interface separation under shear flow. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122384] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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Zhou Y, Zhou Y, Deng H, Yuan L, Chen Y, Zhang S, Fu Q. Enhanced fracture energy during deformation through the construction of an alternating multilayered structure for polyolefin blends. POLYM INT 2018. [DOI: 10.1002/pi.5615] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yan Zhou
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu China
| | - Yi Zhou
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu China
| | - Hua Deng
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu China
| | - Li Yuan
- ExxonMobil Asia Pacific Research and Development Co., Ltd.; Shanghai China
| | - Yumin Chen
- ExxonMobil Asia Pacific Research and Development Co., Ltd.; Shanghai China
| | - Shanshan Zhang
- ExxonMobil Asia Pacific Research and Development Co., Ltd.; Shanghai China
| | - Qiang Fu
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu China
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9
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Dual effects of compatibilizer on the formation of oriented ribbon-like dispersed phase domains in polystyrene/polyamide 6 blends. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2017.12.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Deng H, Fu Q. Recent Progress on the Confinement, Assembly, and Relaxation of Inorganic Functional Fillers in Polymer Matrix during Processing. Macromol Rapid Commun 2017; 38. [DOI: 10.1002/marc.201700444] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 08/16/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Hua Deng
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P. R. China
| | - Qiang Fu
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P. R. China
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11
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Zhou Y, Yu F, Deng H, Huang Y, Li G, Fu Q. Morphology Evolution of Polymer Blends under Intense Shear During High Speed Thin-Wall Injection Molding. J Phys Chem B 2017; 121:6257-6270. [PMID: 28590755 DOI: 10.1021/acs.jpcb.7b03374] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The morphology evolution under shear during different processing is indeed an important issue regarding the phase morphology control as well as final physical properties of immiscible polymer blends. High-speed thin wall injection molding (HSTWIM) has recently been demonstrated as an effective method to prepare alternating multilayered structure. To understand the formation mechanism better and explore possible phase morphology for different blends under HSTWIM, the relationship between the morphology evolution of polymer blends based on polypropylene (PP) under HSTWIM and some intrinsic properties of polymer blends, including viscosity ratio, interfacial tension, and melt elasticity, is systematically investigated in this study. Blends based on PP containing polyethylene (PE), ethylene vinyl alcohol copolymer (EVOH), and polylactic acid (PLA) are used as examples. Compatibilizer has also been added into respective blends to alter their interfacial interaction. It is demonstrated that dispersed phase can be deformed into a layered-like structure if interfacial tension, viscosity ratio, and melt elasticity are relatively small. While some of these values are relatively large, these dispersed droplets are not easily deformed under HSTWIM, forming ellipsoidal or fiber-like structure. The addition of a moderate amount of compatibilizer into these blends is shown to be able to reduce interfacial tension and the size of dispersed phase, thus, allowing more deformation on the dispersed phase. Such a study could provide some guidelines on phase morphology control of immiscible polymer blends under shear during various processing methods.
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Affiliation(s)
- Yi Zhou
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University , Sichuan Sheng 610000, P.R. China
| | - Feilong Yu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University , Sichuan Sheng 610000, P.R. China
| | - Hua Deng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University , Sichuan Sheng 610000, P.R. China
| | - Yajiang Huang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University , Sichuan Sheng 610000, P.R. China
| | - Guangxian Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University , Sichuan Sheng 610000, P.R. China
| | - Qiang Fu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University , Sichuan Sheng 610000, P.R. China
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12
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Cheng J, Pu H. Influences of matrix viscosity on alignment of multi-walled carbon nanotubes in one-dimensional confined space. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.02.044] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Processing condition induced structural evolution in the alternating multi-layer structure during high speed thin-wall injection molding. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.06.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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15
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Pan Y, Liu X, Hao X, Schubert DW. Conductivity and phase morphology of carbon black-filled immiscible polymer blends under creep: an experimental and theoretical study. Phys Chem Chem Phys 2016; 18:32125-32131. [PMID: 27847954 DOI: 10.1039/c6cp06175c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The simultaneous evolution of conductivity and phase morphology of blend composites was investigated under shear and in the quiescent state.
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Affiliation(s)
- Yamin Pan
- Institute of Polymer Materials
- Friedrich-Alexander University Erlangen-Nuremberg
- 91058 Erlangen
- Germany
| | - Xianhu Liu
- Institute of Polymer Materials
- Friedrich-Alexander University Erlangen-Nuremberg
- 91058 Erlangen
- Germany
| | - Xiaoqiong Hao
- School of Science
- Xi'an Jiaotong University
- Xi'an
- China
| | - Dirk W. Schubert
- Institute of Polymer Materials
- Friedrich-Alexander University Erlangen-Nuremberg
- 91058 Erlangen
- Germany
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16
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Wang L, Feng LF, Gu XP, Zhang CL. Influences of the Viscosity Ratio and Processing Conditions on the Formation of Highly Oriented Ribbons in Polymer Blends by Tape Extrusion. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b03240] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Long Wang
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, P.R. China
| | - Lian-Fang Feng
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, P.R. China
| | - Xue-Ping Gu
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, P.R. China
| | - Cai-Liang Zhang
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, P.R. China
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17
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Carbon nanotube-filled polypropylene/polyethylene blends: compatibilization and electrical properties. Polym Bull (Berl) 2015. [DOI: 10.1007/s00289-015-1530-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Al-Saleh MH. Effect of Clay Addition on the Properties of Carbon Nanotubes-Filled Immiscible Polyethylene/Polypropylene Blends. J MACROMOL SCI B 2015. [DOI: 10.1080/00222348.2015.1085753] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Feldman D. Polyblend Nanocomposites. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2015. [DOI: 10.1080/10601325.2015.1050638] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Yu F, Deng H, Bai H, Zhang Q, Wang K, Chen F, Fu Q. Confine Clay in an Alternating Multilayered Structure through Injection Molding: A Simple and Efficient Route to Improve Barrier Performance of Polymeric Materials. ACS APPLIED MATERIALS & INTERFACES 2015; 7:10178-10189. [PMID: 25915444 DOI: 10.1021/acsami.5b00347] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Various methods have been devoted to trigger the formation of multilayered structure for wide range of applications. These methods are often complicated with low production efficiency or require complex equipment. Herein, we demonstrate a simple and efficient method for the fabrication of polymeric sheets containing multilayered structure with enhanced barrier property through high speed thin-wall injection molding (HSIM). To achieve this, montmorillonite (MMT) is added into PE first, then blended with PP to fabricate PE-MMT/PP ternary composites. It is demonstrated that alternating multilayer structure could be obtained in the ternary composites because of low interfacial tension and good viscosity match between different polymer components. MMT is selectively dispersed in PE phase with partial exfoliated/partial intercalated microstructure. 2D-WAXD analysis indicates that the clay tactoids in PE-MMT/PP exhibits an uniplanar-axial orientation with their surface parallel to the molded part surface, while the tactoids in binary PE-MMT composites with the same overall MMT contents illustrate less orientation. The enhanced orientation of nanoclay in PE-MMT/PP could be attributed to the confinement of alternating multilayer structure, which prohibits the tumbling and rotation of nanoplatelets. Therefore, the oxygen barrier property of PE-MMT/PP is superior to that of PE-MMT because of increased gas permeation pathway. Comparing with the results obtained for PE based composites in literature, outstanding barrier property performance (45.7% and 58.2% improvement with 1.5 and 2.5 wt % MMT content, respectively) is achieved in current study. Two issues are considered responsible for such improvement: enhanced MMT orientation caused by the confinement in layered structure, and higher local density of MMT in layered structure induced denser assembly. Finally, enhancement in barrier property by confining impermeable filler into alternating multilayer structure through such simple and efficient method could provide a novel route toward high-performance packaging materials and other functional materials require layered structure.
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Affiliation(s)
- Feilong Yu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Hua Deng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Hongwei Bai
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Qin Zhang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Ke Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Feng Chen
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Qiang Fu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
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21
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Coupled electrical-thermal-pyrolytic analysis of carbon fiber/epoxy composites subjected to lightning strike. POLYMER 2015. [DOI: 10.1016/j.polymer.2014.11.029] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Chen X, Liu L, Liu J, Pan F. Microstructure, electromagnetic shielding effectiveness and mechanical properties of Mg–Zn–Y–Zr alloys. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.matdes.2014.09.034] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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23
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Zhao X, Huang Y, Kong M, Yang Q, Li G. Retarded stress and morphology relaxation of deformed polymer blends in the presence of a triblock copolymer. RSC Adv 2014. [DOI: 10.1039/c4ra11869c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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24
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Zhao Y, Su B, Zhong L, Chen F, Fu Q. Largely Improved Mechanical Properties of a Poly(styrene-b-isoprene-b-styrene) Thermoplastic Elastomer Prepared under Dynamic-Packing Injection Molding. Ind Eng Chem Res 2014. [DOI: 10.1021/ie5022514] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yongsheng Zhao
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science & Engineering, Sichuan University, Chengdu 610065, People’s Republic of China
| | - Bin Su
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science & Engineering, Sichuan University, Chengdu 610065, People’s Republic of China
| | - Licai Zhong
- Department of Electrical and Mechanical Engineering, Lanzhou Resources & Environment Voc-Tech College, Lanzhou 730021, People’s Republic of China
| | - Feng Chen
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science & Engineering, Sichuan University, Chengdu 610065, People’s Republic of China
| | - Qiang Fu
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science & Engineering, Sichuan University, Chengdu 610065, People’s Republic of China
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25
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Zhang S, Deng H, Zhang Q, Fu Q. Formation of conductive networks with both segregated and double-percolated characteristic in conductive polymer composites with balanced properties. ACS APPLIED MATERIALS & INTERFACES 2014; 6:6835-6844. [PMID: 24745303 DOI: 10.1021/am500651v] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Morphological control of conductive networks involves the construction of segregated or double-percolated conductive networks is often reported to reduce the electrical percolation threshold of conductive polymer composites (CPCs) for better balance among electrical conductivity, mechanical properties, and filler content. Herein, the construction of conductive networks with both segregated and double-percolated characteristics is achieved based on polypropylene (PP)/polyethylene (PE) and multi-wall carbon nanotubes (CNTs). CNTs were firstly dispersed in PE; then PE/CNTs were compounded with PP particles well below the melting temperature of PP. It is observed that the percolation threshold (pc) decreases with increasing PP particle size (size 3.6 mm, pc=0.08 wt %), which agrees with previous theoretical prediction and experiment in much smaller particle size range. To further study this, the amount of CNTs in PE is varied. It is shown that the degree of PE/CNTs coating on PP particles varies with CNTs as well as PE content in these composites, and have significant influence on the final electrical property. Furthermore, a model combines classical percolation theory and model for segregated network has been proposed to analyze the effect of particle size, degree of coating and thickness of coating on the percolation behavior of these CPCs. In such a model the percolation of CNTs in PE phase as well as PENT phase in the segregated structure can be described. Overall, through such method, a much better balance among mechanical property, conductivity, and filler content is achieved in these CPCs comparing with the results in literature.
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Affiliation(s)
- Shuangmei Zhang
- College of Polymer Science and Engineering, Sichuan University , State Key Laboratory of Polymer Materials Engineering, Chengdu, Sichuan, China
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Zhang R, Tang P, Li J, Xu D, Bin Y. Study on filler content dependence of the onset of positive temperature coefficient (PTC) effect of electrical resistivity for UHMWPE/LDPE/CF composites based on their DC and AC electrical behaviors. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.02.065] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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