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Journal Article
Thermo-mechanical properties of shape-recoverable structural composites via vacuum-assisted resin transfer molding process and in-situ polymerization of poly (tert-butyl acrylate-co-acrylic acid) copolymer
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- Authors
- Jei Gyeong Jeon, Byeong Jun So, Yuseung Choi, Yusu Han, Taehoon Kim, Gilyong Shin, Ju Hwan Lee, Hyeong Jun Kim, Ju Hyeon Kim, Saman Farhangdoust, Fu-Kuo Chang, Minkook Kim, Min Wook Lee, Sungryul Yun, Tae June Kang
- Issue Date
- 2024-10
- Citation
- Composites Part A: Applied Science and Manufacturing, v.185, pp.1-11
- ISSN
- 1359-835X
- Publisher
- Elsevier Ltd.
- Language
- English
- Type
- Journal Article
- Abstract
- When selecting a polymer matrix to make shape memory polymer composites (SMPCs), it is crucial to consider high elastic modulus below the switching temperature (Tsw), a significant variation in the modulus above Tsw, and the ability to control Tsw. This research introduces shape-recoverable structural composites fabricated from poly (tert-butyl acrylate-co-acrylic acid) (PtBA-AA), which has a significant modulus variation before and after Tsw. Capillary numbers are assessed to minimize void formation at varying acrylic acid (AA) concentrations, which regulate the copolymer's polarity and the thermo-mechanical properties. The glass transition temperature of PtBA-AA can be adjusted from 47.4 °C to 91.6 °C. Furthermore, the elastic modulus of SMPC increases from 13 GPa to 20 GPa, whereas the tensile strength increases from 526 MPa to 889 MPa. The maximum recovery strength measured 100.4 MPa at an AA molar ratio of 0.23, accompanied by a fixity of 89.1 % and a recovery ratio of 97.2 %.
- KSP Keywords
- High elastic modulus, Maximum recovery, Mechanical properties(PMCs), Molar ratio, Shape memory polymer(SMP), Shape memory polymer composites, Strength increases, Structural composites, Switching temperature, Tensile Strength, Thermo-mechanical properties