Optimization of compression molding process for mixing natural rubber with synthetic rubber

NR/EPDM mixed development has continuously grown due to its superior physical characteristics and good weathering resistance, especially zoning. EPDM offers improved chemical resistance and oxidation, whereas NR has great strength and excellent dynamic characteristics. Through different procedures,...

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Main Author:	Kasman, Muhammad Zaki
Format:	Thesis
Language:	English English
Published:	2022
Subjects:	T Technology (General) TS Manufactures
Online Access:	http://eprints.utem.edu.my/id/eprint/26924/1/Optimization%20of%20compression%20molding%20process%20for%20mixing%20natural%20rubber%20with%20synthetic%20rubber.pdf http://eprints.utem.edu.my/id/eprint/26924/2/Optimization%20of%20compression%20molding%20process%20for%20mixing%20natural%20rubber%20with%20synthetic%20rubber.pdf
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spelling	my-utem-ep.269242023-10-16T11:02:46Z Optimization of compression molding process for mixing natural rubber with synthetic rubber 2022 Kasman, Muhammad Zaki T Technology (General) TS Manufactures NR/EPDM mixed development has continuously grown due to its superior physical characteristics and good weathering resistance, especially zoning. EPDM offers improved chemical resistance and oxidation, whereas NR has great strength and excellent dynamic characteristics. Through different procedures, such as latex dippers and extruding and calendaring, compression moldings, these rubber-based goods may be produced. For economic reasons, compression molding is an important method. The major problem of this procedure is that portion of the discrepancy is directly linked to the process parameter, which makes this technique less sustainable. Distortion and shrinking are two main issues related to elastomer compression. Because of the flexibility of the rubber material and the temperature that affects the material, it may become distorted by removing the rubber portion from the mold by deepening it. Furthermore, the reduction is the result of a restricted period for solidified material. Micro-fractures developed beneath the optical microscopic images on the rubber surface. This work focuses in this field on the investigation of the parameters of compression molding (i.e., temperature, pressure, heating time, and pressure time) and their impact on the mechanical characteristics of NR/EPDM elastomers (i.e., ultimate tensile strength (UTS), cross-lines and exenteration errors). The aim of the research is to determine optimal settings for processing compression molding. The optimization is accomplished using RSM and the Box Behnken technique as experimental design for a total of 29 runs. A mathematical model for each response is developed to access the relationship between the parameters. Furthermore, in the measurement of important input variables and potential interactions, the suitability of the models is statistically evaluated using an analysis of variance (ANOVA). Finally, numerical optimization is used to optimize several objective outcomes and verify anticipated results. Between 93% and 96%, there is a strong agreement between the experimental combinations and the chosen parameter combinations, confirming the solution as an optimum running condition. The results show that temperature and heating are the major components that affect ultimate tensile strength, while there is just one important temperature parameter for cross-link density. The temperature of UTS and link density decreases with the deterioration of the heat (the temperature is too high for NR/EPDM). Therefore, the procedure under the NR/EPDM degrading point is suggested to prevent scissoring rubber to improve the mechanical characteristics afterward. 2022 Thesis http://eprints.utem.edu.my/id/eprint/26924/ http://eprints.utem.edu.my/id/eprint/26924/1/Optimization%20of%20compression%20molding%20process%20for%20mixing%20natural%20rubber%20with%20synthetic%20rubber.pdf text en public http://eprints.utem.edu.my/id/eprint/26924/2/Optimization%20of%20compression%20molding%20process%20for%20mixing%20natural%20rubber%20with%20synthetic%20rubber.pdf text en validuser https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=122115 mphil masters Universiti Teknikal Malaysia Melaka Faculty of Manufacturing Engineering Kasim, Mohd Shahir
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
advisor	Kasim, Mohd Shahir
topic	T Technology (General) TS Manufactures
spellingShingle	T Technology (General) TS Manufactures Kasman, Muhammad Zaki Optimization of compression molding process for mixing natural rubber with synthetic rubber
description	NR/EPDM mixed development has continuously grown due to its superior physical characteristics and good weathering resistance, especially zoning. EPDM offers improved chemical resistance and oxidation, whereas NR has great strength and excellent dynamic characteristics. Through different procedures, such as latex dippers and extruding and calendaring, compression moldings, these rubber-based goods may be produced. For economic reasons, compression molding is an important method. The major problem of this procedure is that portion of the discrepancy is directly linked to the process parameter, which makes this technique less sustainable. Distortion and shrinking are two main issues related to elastomer compression. Because of the flexibility of the rubber material and the temperature that affects the material, it may become distorted by removing the rubber portion from the mold by deepening it. Furthermore, the reduction is the result of a restricted period for solidified material. Micro-fractures developed beneath the optical microscopic images on the rubber surface. This work focuses in this field on the investigation of the parameters of compression molding (i.e., temperature, pressure, heating time, and pressure time) and their impact on the mechanical characteristics of NR/EPDM elastomers (i.e., ultimate tensile strength (UTS), cross-lines and exenteration errors). The aim of the research is to determine optimal settings for processing compression molding. The optimization is accomplished using RSM and the Box Behnken technique as experimental design for a total of 29 runs. A mathematical model for each response is developed to access the relationship between the parameters. Furthermore, in the measurement of important input variables and potential interactions, the suitability of the models is statistically evaluated using an analysis of variance (ANOVA). Finally, numerical optimization is used to optimize several objective outcomes and verify anticipated results. Between 93% and 96%, there is a strong agreement between the experimental combinations and the chosen parameter combinations, confirming the solution as an optimum running condition. The results show that temperature and heating are the major components that affect ultimate tensile strength, while there is just one important temperature parameter for cross-link density. The temperature of UTS and link density decreases with the deterioration of the heat (the temperature is too high for NR/EPDM). Therefore, the procedure under the NR/EPDM degrading point is suggested to prevent scissoring rubber to improve the mechanical characteristics afterward.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Kasman, Muhammad Zaki
author_facet	Kasman, Muhammad Zaki
author_sort	Kasman, Muhammad Zaki
title	Optimization of compression molding process for mixing natural rubber with synthetic rubber
title_short	Optimization of compression molding process for mixing natural rubber with synthetic rubber
title_full	Optimization of compression molding process for mixing natural rubber with synthetic rubber
title_fullStr	Optimization of compression molding process for mixing natural rubber with synthetic rubber
title_full_unstemmed	Optimization of compression molding process for mixing natural rubber with synthetic rubber
title_sort	optimization of compression molding process for mixing natural rubber with synthetic rubber
granting_institution	Universiti Teknikal Malaysia Melaka
granting_department	Faculty of Manufacturing Engineering
publishDate	2022
url	http://eprints.utem.edu.my/id/eprint/26924/1/Optimization%20of%20compression%20molding%20process%20for%20mixing%20natural%20rubber%20with%20synthetic%20rubber.pdf http://eprints.utem.edu.my/id/eprint/26924/2/Optimization%20of%20compression%20molding%20process%20for%20mixing%20natural%20rubber%20with%20synthetic%20rubber.pdf
_version_	1783728752007577600

Optimization of compression molding process for mixing natural rubber with synthetic rubber

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