Morphology and non-isothermal crystallization of dynamically vulcanized PP/EPDM blends in situ compatibilized via magnesium dimethacrylate |
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| Institution: | 1. The Key Laboratory of Polymer Processing Engineering, Ministry of Education, South China University of Technology, Guangzhou 510640, China;2. Research and Development Department, Zhejiang Zhongning Silicon Company Ltd, QuZhou 324000, China;3. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China;1. MMRI/ CAPPA-D, Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada;2. 3M Canada Company, London, Ontario, Canada;1. College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen University, Shenzhen 518060, PR China;2. Key Laboratory of Optoelectronic Devices and System of Ministry Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, PR China;1. CIMJECT Laboratory, Department of Mechanical Engineering, Federal University of Santa Catarina, 88040-900 Florianópolis, SC, Brazil;2. Biomechanics Engineering Laboratory, University Hospital (HU), Federal University of Santa Catarina, 88040-900 Florianópolis, SC, Brazil;3. Dipartimento di Chimica, Materiali ed Ingegneria Chimica “G. Natta”, Politecnico di Milano, Edificio 6, Piazza L. da Vinci 32, 20133 Milano, Italy;1. Institute for Polymer Technologies e. V., 23966 Wismar, Germany;2. Department of Mechanical Engineering, Hochschule Wismar University of Applied Sciences, Technology, Business and Design, 23966 Wismar, Germany;3. Department of Plastics Technologies, Ilmenau University of Technology, 98693 Ilmenau, Germany;1. Nanshan District Key Lab for Biopolymers and Safety Evaluation, College of Materials Science and Engineering and Department of Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong, China;2. Chonbuk National University, School of Semiconductor and Chemical Engineering, Baekjero 567, Deokjin-gu, Jeonju, Jeonbuk 561–756, Republic of Korea;3. Department of Chemical Engineering, NED University of Engineering & Technology, University Road, Karachi 75270, Pakistan;4. Advanced Pharmaceutics and Drug Delivery Laboratory, Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Ontario M5S 3M2, Canada;5. DSM Biomedical, 735 Pennsylvania Dr, Exton, PA 19341, USA;1. Center for Technology Innovation – Mechanical Engineering, Research & Development Group, Hitachi, Ltd., Hitachinaka, Japan;2. Department of Mechanical Engineering, Ritsumeikan University, Kusatsu, Japan |
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| Abstract: | Polypropylene/ethylene-propylene-diene rubber (PP/EPDM) blends in situ compatibilized by magnesium dimethacrylate (MDMA) were fabricated via peroxide-induced dynamic vulcanization. Scanning electron microscope observation indicated that the size of cross-linked EPDM particles decreased with incorporation of MDMA. Polarizing Optical Microscope (POM) analysis suggested that the spherulite size of PP phase decreased sharply with incorporation of MDMA during dynamic vulcanization. The Pseudo-Avrami, Ozawa and Mo's models were applied to analyze the non-isothermal crystallization kinetics of the composites. The analyzed data indicated that the crosslinked EPDM particles and homopolymerized MDMA acted as heterogeneous nucleating agents, which enhanced the crystallizability and decreased the spherulite size of the PP phase. In addition, the non-isothermal crystallization activation energy (ΔE) was calculated through the Kissinger and Friedman methods, and the ΔE value was found increase with incorporation of MDMA. |
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| Keywords: | PP/EPDM Unsaturated carboxylic acid salt Dynamical vulcanization Morphology Non-isothermal crystallization |
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