• Journal of the Korean Applied Science and Technology
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• v.35 no.2
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• pp.502-508
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• 2018

The acrylate copolymer having good coating, water-repellent and adhesion properties was designed and prepared. We prepared copolymers with high yield of > 95% using methyl methacrylate(MMA), 2,2,2-trifluoroethyl acrylate (FMA) and 2-hydroxyethyl methacrylate monomers(HEMA) by either bulk or emulsion polymerization techniques. The $^1H-NMR$ spectrum was used to identify chemical structure and DSC and DMA analysis were conducted. As a result, the glass transition temperature decreased by $3^{\circ}C$ as FMA content increased from 5% to 10%, and decreased by $2{\sim}8^{\circ}C$ when HEMA content increased from 5 % to 10 %. The physical properties were measured using Instron and TGA. As FMA or HEMA content increased by 10%, tensile strength decreased from 29 MPa to 22 MPa and Td decreased from $200^{\circ}C$ to $180^{\circ}C$ in both bulk and emulsion. The contact angle relatively decreased as hydrophilic HEMA content increased.

• Polymer(Korea)
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• v.27 no.4
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• pp.364-369
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• 2003

The copolymerizations of 2-fluorohexylethyl acrylate (FA) with 2-(o-(1'-methylpropylidenamino)carboxyl amino)ethyl methacrylate(MEM) with different molar ratios of the two monomers were carried out in methyl ethyl ketone using ${\alpha}$,${\alpha}$'-azobisisobutyronitrile as an initiator to synthesize water repellent polyacrylate derivatives with protected isocyanate groups. The contents of FA and MEM in the copolymers were analyzed by NMR. The monomer reactivity ratios of MEM (1) and FA (2) were determined by Kelen-Tudos plot as follows : r$\_$1/＝1.59 and r$\_$2/＝0.50. The number-average molecular weights of the copolymers were in the range of 39400 to 72400 and the polydispersity indexes were about 1.5. The protected isocyanate groups in the copolymers were converted into isocyanate groups above 150$^{\circ}C$. The contact angle of the copolymer with 65 ㏖% of FA fur water was about 95$^{\circ}$.