Publication: Characterizations of polybenzoxazine modified with isomeric biphenyltetracarboxylic dianhydrides
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Issued Date
2012
Resource Type
File Type
application/pdf
ISSN
1788618X
Other identifier(s)
2-s2.0-84864807692
Rights Holder(s)
Scopus
Bibliographic Citation
Express Polymer Letters. Vol 6, No.10 (2012), p.773-782
Suggested Citation
Rimdusit S., Ramsiri B., Jubsilp C., Dueramae I. Characterizations of polybenzoxazine modified with isomeric biphenyltetracarboxylic dianhydrides. Express Polymer Letters. Vol 6, No.10 (2012), p.773-782. doi:10.3144/expresspolymlett.2012.83 Retrieved from: https://hdl.handle.net/20.500.14740/6963
Author(s)
Abstract
A series of polymeric alloying films were prepared from bisphenol A/aniline-based bifunctional benzoxazine resin (BA-a) with three isomeric biphenyltetracarboxylic dianhydrides, i.e., 2,3',3,4'-biphenyltetra carboxylic dianhydride (a-BPDA), 2,2!,3,3!-biphenyltetracarboxylic dianhydride (i-BPDA), and 3,3',4,4'-biphenyltetracarboxylic dianhydride (s-BPDA) through fully thermal curing. Chemical structure, thermomechanical property and thermal stability of bisphenol A/aniline type polybenzoxazine (PBA-a) copolymers were evaluated. Their chemical structures analyzed via Fourier transform infrared spectroscopy reveal ester carbonyl linkage formation between hydroxyl group of the PBA-a and anhydride group in the isomeric dianhydride. Glass transition temperatures (T gs) of the dianhydride-modified PBA-a increased with PBA-a << i-BPDA < a-BPDA < s-BPDA. Degradation temperatures (T d) of the PBA-a copolymers recorded to be in the range of 365-402°C were significantly higher than that of the neat PBA-a i.e. 334°C. Finally, char yield of the PBA-a copolymers was found to be about 54-57% which is about twofold increase from that of the parent PBA-a. © BME-PT.
Subject(s)
Benzoxazine resin
Bifunctional
Bisphenol A
Char yield
Degradation temperatures
Dianhydrides
Ester carbonyl
Hydroxyl groups
Isomeric dianhydride
Polybenzoxazine
Thermal curing
Thermomechanical properties
Copolymers
Degradation
Fourier transform infrared spectroscopy
Mechanical properties
Phenols
Polymeric films
Structure (composition)
Thermodynamic properties
Polymer blends
Bifunctional
Bisphenol A
Char yield
Degradation temperatures
Dianhydrides
Ester carbonyl
Hydroxyl groups
Isomeric dianhydride
Polybenzoxazine
Thermal curing
Thermomechanical properties
Copolymers
Degradation
Fourier transform infrared spectroscopy
Mechanical properties
Phenols
Polymeric films
Structure (composition)
Thermodynamic properties
Polymer blends