Study of thermal properties of difunctional benzoxazines

Three difunctional benzoxazine monomers bis (3,4-dihydro-2H-3-phenyl- 1,3-benzoxazinyl) methane, (abbreviated as BF-a), bis (3,4-dihydro-2H-3-phenyl-1, 3-benzoxazinyl) isopropane, (abbreviated as BA-a), bis (3,4-dihydro-2H-3-phenyl- 1,3-benzoxazinyl) biphenyl, (abbreviated as BP-a) were successfully...

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Published ine-Polymers Vol. 9; no. 1; pp. 1141 - 1148
Main Authors Zhao, Chun’e, Xu, Guoliang, Zeng, Ke, Miao, Peikai, Zhou, Hongfei, Wang, Yipeng, Liu, Tao, Yang, Gang
Format Journal Article
LanguageEnglish
Published De Gruyter 01.12.2009
Subjects
benzoxazine monomers
benzoxazines
prepolymers
thermal property
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Summary:Three difunctional benzoxazine monomers bis (3,4-dihydro-2H-3-phenyl- 1,3-benzoxazinyl) methane, (abbreviated as BF-a), bis (3,4-dihydro-2H-3-phenyl-1, 3-benzoxazinyl) isopropane, (abbreviated as BA-a), bis (3,4-dihydro-2H-3-phenyl- 1,3-benzoxazinyl) biphenyl, (abbreviated as BP-a) were successfully synthesized via phenol (bisphenol A, 4,4’-Biphenol, bisphenol F), aniline and paraformaldehyde. Their structures were identified by H NMR and FT-IR. The monomers were thermally treated at 200 oC for 2 h in nitrogen to give corresponding prepolymers. The thermal properties of the monomers were investigated by TGA under nitrogen atmosphere. The thermal properties of the prepolymers were investigated by TGA under nitrogen and air atmosphere. It was found that the monomers of BF-a and BA-a showed lower melting points and exhibited wider processing windows than BP-a. The prepolymer from BP-a showed good thermal stabilities, compared with the prepolymers from BF-a and BA-a.
ISSN:2197-4586
1618-7229
1618-7229
DOI:10.1515/epoly.2009.9.1.1141