Effect of Multi-functional Group of Acrylate Crosslinker on Properties of Waterborne Polyurethane-acrylateEffect of Multi-functional Group of Acrylate Crosslinker on Properties of Waterborne Polyurethane-acrylate
- Authors
- 문석규; 김은진; 권영록; 김정수; 김해찬; 박한수; 김동현
- Issue Date
- Sep-2022
- Publisher
- 한국고무학회
- Keywords
- waterborne polyurethane-acrylate; crosslinker; mechanical properties; thermal stability
- Citation
- 엘라스토머 및 콤포지트, v.57, no.3, pp 100 - 106
- Pages
- 7
- Journal Title
- 엘라스토머 및 콤포지트
- Volume
- 57
- Number
- 3
- Start Page
- 100
- End Page
- 106
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/59042
- DOI
- 10.7473/EC.2022.57.3.100
- ISSN
- 2092-9676
2288-7725
- Abstract
- Waterborne polyurethane-acrylate(WPUA) dispersions were prepared by surfactant-free emulsion polymerization in a two-step process. In the first step, polytetrahydrofuran, isophorone diisocyanate, dimethylol proponic acid, and 2- hydroxyethyl methacrylate were used to synthesize a vinyl-terminated polyurethane prepolymer. In the second step, styrene, methyl methacrylate, butyl acrylate, and different multi-functional crosslinkers were copolymerized. 1,6-hexanediol diacrylate, trimethylolpropane triacrylate, and pentaerythritol tetraacrylate were used as the crosslinkers, and their effect on the mechanical and thermal properties of WPUA was investigated. Overall, as the number of functional groups of the crosslinker increased, the gel fraction improved to 79.26%, the particle size increased from 75.9 nm to 148.7 nm, and the tensile strength was improved from 5.86 MPa to 12.40 MPa. In thermal properties, the glass transition temperature and decomposition temperature increased by 9.9℃ and 18℃, respectively. The chemical structures of the WPUA dispersions were characterized by Fourier-transform infrared spectroscopy. The synthesized WPUA has high potential for applications such as coatings, leather coatings, adhesives, and wood finishing.
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Collections - College of ICT Engineering > School of Integrative Engineering > 1. Journal Articles
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