Effect of polyurethane sizing agent on interface properties of carbon fiber reinforced polycarbonate composites

ABSTRACT This work is aimed at investigating how molecule structure of polyurethanes (PUs) as sizing agents influence the interface properties of carbon fiber (CF) reinforced polycarbonate (PC) composites. Effects of four PUs as sizing agents for CF on the interlaminar shear strength (ILSS) of CF re...

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Bibliographic Details
Published in:Journal of applied polymer science 2019-10, Vol.136 (38), p.n/a
Main Authors: Zhang, Weisu, Yang, Changling, Yao, Lili, Li, Zhihao, Li, Shengxia, Lu, Yonggen
Format: Article
Language:English
Subjects:
Carbon fiber reinforced plastics
Carbon fibers
coatings
composites
Fiber composites
Fiber reinforced polymers
fibers
Interfacial properties
Interfacial shear strength
Isocyanates
Materials science
Molecular structure
Organic chemistry
Polycarbonate resins
Polymer matrix composites
Polymers
Polyurethane resins
Shear strength
Sizing
surfaces and interfaces
thermoplastics
Transesterification
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Summary:ABSTRACT This work is aimed at investigating how molecule structure of polyurethanes (PUs) as sizing agents influence the interface properties of carbon fiber (CF) reinforced polycarbonate (PC) composites. Effects of four PUs as sizing agents for CF on the interlaminar shear strength (ILSS) of CF reinforced PC composites are investigated. It is found that the three PUs except PC–PU as sizing agents on oxidized CF (OCF) made the ILSS of their reinforced PC composites increase up to 62.9 MPa by more than 24.8%. The chemical interaction between PU sizing agents and CF are attributed to high reactivity of isocyanate, but carbonate groups on PC–PU may have a chain unzipping reaction due to active groups on the surface of OCF. The chemical interaction between PU sizing agents and PC are attributed to transesterification. As a result, PUs containing isocyanate or polyester groups are ideal sizing agents for CF reinforced PC composites. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47982. PU sizing agents help to build a strong interface.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.47982