Materials Reports  2020, Vol. 34 Issue (Z2): 534-538 |
| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Polypropylene/Ethylene-vinyl Alcohol Copolymer Hollow Fibers and Its Hard Elastic Behavior |
| LUO Dajun1,2, QIN Shuhao2, WU Jianming1, LI Yang1, GAO Jin1
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1 School of Materials and Metallurgical Engineering, Guizhou Institute of Technology, Guiyang 550003, China
2 National Engineering Research Center for Compounding and Modification of Polymeric Materials, Guiyang 550014, China |
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Abstract Ethylene-vinyl alcohol copolymer (EVOH) as hydrophilic modification agent and polypropylene-g-maleic anhydride (PP-g-MAH) as a compatibilizer were blended with PP to prepare hydrophilic PP/EVOH hollow fibers with hard elasticity by melt spinning. The effect of EVOH on the hydrophilicity of PP matrix and hollow fibers was investigated by WCA and EDS analysis. The crystallization behavior of PP phase in PP/EVOH hollow fibers after adding EVOH was also analyzed by DSC. In addition, the mechanical properties and elastic recovery of PP/EVOH hollow fibers were tested, and the hard elastic behavior of PP/EVOH hollow fibers was comprehensively analyzed. The results showed that the hydrophilicity of PP/EVOH hollow fibers was effectively improved with the increase of EVOH content, and the maximum surface oxygen content of the fiber was 5.65wt%. After adding PP-g-MAH, the crystallization of the PP phase was hindered, resulting in weakening of the hard elasticity of the PP/EVOH hollow fibers. Although the addition of EVOH can play the role of heterogeneous nucleation and promote crystallization, PP/EVOH hollow fibers still showed good hard elasticity. However, the hard elasticity of PP/EVOH hollow fibers were still lower than that of pure PP hollow fiber.
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Published: 08 January 2021
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| Fund:This work was financially supported by the Guizhou Provincial Science and Technology Plan Project ([2016]7099, [2019]1134). |
| About author:: Dajun Luo received his Ph.D. degree in materials science from the Guizhou University in June 2019. In 2018, he won the national scholarship for doctoral students. He is currently an associate professor at Guizhou Institute of Technology. He has published 10 journal papers as the first author in international and domestic academic journals such as Energy, Separation & Purification Technology, Journal of Materials Science, etc. He has applied 6 national invention patents and 2 of them were authorized. His research interests focus on the preparation techno-logy of polymer separation membrane materials, and the theoretical research of the structure control, performance optimization and membrane formation mechanism of the separation membrane for application purposes, as well as the theoretical and experimental research of energy storage technology. |
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