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Synthesis of photo‐crosslinked hybrid fluoropolymer and its application as releasing coating for silicone pressure‐sensitive adhesives
Author(s) -
Wang Yu,
Bai Yongping,
Yue Lipeng,
Zheng Xiaoqiang
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48322
Subject(s) - fluoropolymer , materials science , coating , polymer , composite material , silicone , contact angle , composite number , polydimethylsiloxane , glass transition , adhesive , antistatic agent , graphene , interpenetrating polymer network , polymer chemistry , nanotechnology , layer (electronics)
In this study, a novel photo‐crosslinked polymer composite was made from NCO‐terminated fluoropolymers by the incorporation of functionalized graphene through the in situ polymerization method. This polymer composite can be photoinduced to form a network under UV radiation without photoinitiators, displaying an excellent transmittance (T% > 90% at 550 nm), a high thermostability with a glass transition temperature ( T g < −15 °C), and a 10% weight loss temperature (410 °C). With UV radiation, the hybrid coating exhibited a controlled releasing force between 100 and 500 g/25 mm for silicone PSAs, which was an important breakthrough in the heavy‐releasing industry. Their aging releasing performance and residual adhesion force were satisfactory. More importantly, antistatic agents are not needed any more before the coating of this novel releasing agent. In addition, the coating possessed good hydrophobicity with a contact angle of 110° and great resistance to solvents. These metrics indicate that incorporating functionalized graphene as curable points into composites can greatly improve the performance of fluoropolymer properties. The obtained polymers have potential applications in the releasing and protective industry. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48322.