Publication:
Thermomechanical characteristics of benzoxazine-urethane copolymers and their carbon fiber-reinforced composites

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Issued Date

2009

Resource Type

Article

File Type

application/pdf

ISSN

218995

DOI

10.1002/app.30344

Other identifier(s)

2-s2.0-67649500003

Rights Holder(s)

Scopus

Bibliographic Citation

Journal of Applied Polymer Science. Vol 113, No.6 (2009), p.3823-3830

Suggested Citation

Rimdusit S., Liengvachiranon C., Tiptipakorn S., Jubsilp C. Thermomechanical characteristics of benzoxazine-urethane copolymers and their carbon fiber-reinforced composites. Journal of Applied Polymer Science. Vol 113, No.6 (2009), p.3823-3830. doi:10.1002/app.30344 Retrieved from: https://hdl.handle.net/20.500.14740/4305

Title

Thermomechanical characteristics of benzoxazine-urethane copolymers and their carbon fiber-reinforced composites

Author(s)

Rimdusit S.
 Liengvachiranon C.
 Tiptipakorn S.
 Jubsilp C.

Abstract

Copolymers of polybenzoxazine (BA-a) and urethane elastomer (PU) with three different structures of isocyanates [i.e., toluene diisocyanate (TDI), diphenylmethane diisocyanate, and isophorone diisocyanate ], were examined. The experimental results reveal that the enhancement in glass transition temperature (Tg) of BA-a/PU copolymers was clearly observed [i.e., Tg of the BA-a/PU copolymers in 60 : 40 BA-a : PU system, for all isocyanate types (Tg beyond 230°C) was higher than those of the parent resins (165°C for BA-a and -70°C for PU)]. It was reported that the degradation temperature increased from 321°C to about 330°C with increasing urethane content. Furthermore, the flexural strength synergism was found at the BA-a. : PU ratio of 90 : 1.0 for all types of isocyanates. The effect of urethane prepolymer based on TDI rendered the highest Tg, flexural modulus, and flexural strength of the copolymers among the three isocyanates used. The preferable isocyanate of the binary systems for making high processable carbon fiber composites was based on TDI. The flexural strength of the carbon fiber-reinforced BA-a : PU based on TDI at 80 wt % of the fiber in cross-ply orientation provided relatively high values of about 490 MPa. The flexural modulus slightly decreased from 51 GPa for polybenzoxazine to 48 GPa in the 60 : 40 BA-a. : PU system. © 2009 Wiley Periodicals, Inc.

Subject(s)

Bending strength
 Copolymerization
 Copolymers
 Curing
 Fibers
 Glass transition
 Interchanges
 Plastic products
 Reinforcement
 Resins
 Thermosets
 Toluene
 Benzoxazine
 Binary systems
 Carbon fiber composite
 Composites
 Cross-ply
 Curing of polymers
 Degradation temperatures
 Different structure
 Diphenylmethane diisocyanate
 Fiber-reinforced composite
 Flexural modulus
 Flexural strength
 Glass transition temperature
 Isophorone diisocyanate
 Polybenzoxazine
 Prepolymer
 Processable
 PU systems
 Thermo-mechanical characteristics
 Toluene diisocyanate
 Urethane elastomers
 Carbon fibers
 Carbon fiber
 Copolymer
 Degradation
 Fiber reinforced composite
 Glass transition temperature
 Mechanical property
 Temperature effect
 Thermal property

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URI

https://hdl.handle.net/20.500.14740/4305

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Scopus: Year 1983-2021

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