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    Effect of cyclohexyl methacrylate (CHMA) on the comprehensive properties of acrylate emulsion pressure sensitive adhesives

    Year: 2021

    Journal: J. Adhes. Sci. Technol., Volume 35, JUL 18, page 1558–1575

    Authors: Fang, Cheng; Gao, Yunyi; Zhou, Fuxiang

    Organizations: Nanjing Forestry University College Student Innovation Training Program Project [2020NFUSPITP0076]; Scientific Research of High-level (Highly educated) Talents of Nanjing Forestry University [GXL2018038]; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)

    Keywords: Cyclic methacrylate; cyclohexyl methacrylate; emulsion polymerization; pressure sensitive adhesive

    Cyclic methacrylate monomer cyclohexyl methacrylate (CHMA) was evaluated as an alternative to traditional methyl methacrylate (MMA) as hard monomer in the application of acrylate latex pressure sensitive adhesive (PSA). The influences of CHMA on the resultant latex and PSA properties were comprehensively investigated. Both FTIR and H-1 NMR analysis indicated that CHMA could be successfully introduced into the latex PSA copolymer through emulsion polymerization. TEM images illustrated that the synthesized latex particles are spherical and uniform. DSC and TGA results showed that T-g of the copolymer was elevated, while thermal stability was decreased with introduction of CHMA. Besides, it was also found that water resistance of the latex PSA was improved by the presence of CHMA, confirmed by water contact angle measurements. Furthermore, as CHMA amount increased, gel content slightly decreased, while sol molecular weight (M-w ) of the polymer increased. Finally, it was observed that loop tack decreased, while shear strength increased with the incorporation of CHMA. 180 degrees peel strength of the PSA initially increased and then decreased with the addition of CHMA from 0 to 30 wt%, with a maximum value at 10 wt%.
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