Flexible polybenzoxazine thermosets with high glass transition temperatures and low surface free energies
Literature Information
Publication Date
2012-01-30
DOI
10.1039/C2PY00449F
Impact Factor
5.582
Authors
Ching Hsuan Lin, Sheng Lung Chang, Ting Yi Shen, Yu Sin Shih, Hong Tze Lin, Chih Feng Wang
View Original
Abstract
Four main-chain type polybenzoxazine precursors were synthesized from the Mannich-type polycondensation of biphenol A, paraformaldehyde, and four typical aromatic diamines: 1,4-phenylenediamine, 4,4′-diaminodiphenyl methane, 4,4′-diaminodiphenyl ether, and 2,2-bis[4-(4-aminophenoxy)phenyl]propane. The solvent effect on the polycondensation was examined. We found that polybenzoxazine precursors prepared in toluene/ethanol exhibit higher purity, higher molecular weight, and lead to better thermal properties after curing than those prepared in chloroform, as recommended by Takeichi's group (T. Takeichi et al., Polymer, 2005, 46, 12172). The cured polybenzoxazine films prepared by these polybenzoxazine precursors display unusual flexibility, extremely high Tg, and low surface energy. They show Tg values as high as 272–353 °C (DMA data), coefficients of thermal expansion as low as 39–49 ppm/°C, contact angles as high as 100–102°, and surface energy as low as 17.7–24.5 mJ m−2.
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Source Journal
Polymer Chemistry
CiteScore:
8.6
Self-citation Rate:
7.3%
Articles per Year:
457
Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.
Recommended Compounds
(E)-2-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)but-3-en-2-ol
CAS Number:
581802-26-8
Molecular Formula:
C11H21BO3
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