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Park, Lee Soon
School of Materials Science and Engineering
Research Interests
  • Flexible OLED new materials, process and fabrication
  • Touch Screen Panel(TSP) new materials and process new materials and process
  • Nano-materials synthesis and application (Ag nano-wire and metal mesh electrode)

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Methacrylate homo- and copolymers containing photosensitive abietate group: Their high thermal stability, unique photocrosslinking behavior, transparency, and photolithographic application

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Title
Methacrylate homo- and copolymers containing photosensitive abietate group: Their high thermal stability, unique photocrosslinking behavior, transparency, and photolithographic application
Author
Kwak, GiseopChoi, Jae-UngSeo, Kwan-HoPark, Lee SoonHyun, Seok-HeeKim, Woo-Sik
Keywords
Molecular weight; Monomers; Organic solvents; Photolithography; Solvent extraction; Synthesis (chemical); Thermodynamic stability
Issue Date
2007-05
Publisher
AMER CHEMICAL SOC
Citation
CHEMISTRY OF MATERIALS, v.19, no.11, pp.2898 - 2902
Abstract
The monomer methacryloyloxyethyl abietate (2) was synthesized by a simple two-step reaction starting from abietic acid. The homopolymerization of 2 and its copolymerization with MMA using AIBN as an initiator provided high-molecular-weight polymers 3-6 (10 x 10(3) < M-n < 70 x 10(3)) in high yields. These polymers were well-dissolved in organic solvents. The glass-transition temperatures, T-g, of all polymers were higher than 130 degrees C, much higher than that of PMMA. No melting points, T-m, were observed. Their decomposition temperatures were very high, as T-5 wt % loss > 300 degrees C. These results indicate that these polymers are thermally stable and glassy at room temperature. The absorption bands due to the conjugated carbon-carbon double bonds within the abietate group significantly decreased with an increase in the exposure doses. Normalized absorbance as a function of UV exposure doses nonlinearly changed because of the occurrence of a certain threshold at 1.0 J/cm(2) in all polymers. Solvent extraction experiment revealed that interchain crosslinking effectively occurred even in copolymers with relatively low amounts of the abietate group. The polymer films showed a clear transparency of more than 90%. Photolithography of the polymer films provided high-resolution pattern images
URI
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DOI
10.1021/cm062861y
ISSN
0897-4756
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MSE_Journal Papers
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