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Title: On-demand tailoring between brittle and ductile of poly(methyl methacrylate) (PMMA) via high temperature stretching
Authors: Wang, Changchun
Pek, Jia Xi
Chen, Hong Mei
Huang, Wei Min
Keywords: Engineering::Mechanical engineering
Issue Date: 2022
Source: Wang, C., Pek, J. X., Chen, H. M. & Huang, W. M. (2022). On-demand tailoring between brittle and ductile of poly(methyl methacrylate) (PMMA) via high temperature stretching. Polymers, 14(5), 985-.
Journal: Polymers 
Abstract: Dog-bone shaped poly(methyl methacrylate) (PMMA) samples were pre-stretched at different temperatures (within the glass transition range and slightly above) to different strains. Subsequently, these pre-stretched samples were aged at 40 °C for up to three months, and finally, all samples were uniaxially stretched to fracture. The Young's modulus, ultimate stress and toughness of the samples were obtained and plotted as a function of the temperature, and strain in pre-stretching in the contour format. The influence of aging was revealed when the contours of different aging times were compared. One of the most interesting findings was that the toughness of this PMMA can be tailored via controlling the temperature and strain in pre-stretching. The toughness of the pre-stretched samples ranged from 1.317 MJ/m3 to 23.281 MJ/m3 (without aging) and from 1.476 MJ/m3 to 27.532 MJ/m3 (after three months of aging). Based on the results of a series of additional experiments, a mechanism was proposed to reveal the fundaments behind the influence of the temperature and strain in pre-stretching and aging.
ISSN: 2073-4360
DOI: 10.3390/polym14050985
Schools: School of Mechanical and Aerospace Engineering 
Rights: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// 4.0/).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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