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Title:
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Toughened carbon fiber fabric-reinforced pCBT composites
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Author:
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Abt, Tobias Martin; Krager-Kocsis, Joseph; Sánchez Soto, Miguel
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. POLY2 - Polyfunctional polymeric materials |
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Abstract:
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Toughened carbon fiber-fabric reinforced polymerized
cyclic butylene terephthalate (pCBT) composites were
obtained by chemical modification of cyclic butylene
terephthalate (CBT) with small amounts of epoxy resin
and isocyanates as chain extenders. Homogeneous
CBT/epoxy and CBT/isocyanate blends were prepared
by melt blending the components in a lab-scale batch
mixer at low temperatures and high shear rate. Melt
blending was stopped before the ring-opening polymerization
of CBT could start. The modified CBT was
the starting material for carbon fiber fabric-reinforced
pCBT composites (fiber content at about 65 wt%)
which were prepared by ring-opening polymerization
during compression molding using a simple powder
prepreg method. Interlaminar shear strength, flexural
strength, and failure strain of the chemically modified
composites increased up to 60% with respect to
unmodified pCBT composites. Nevertheless, the flexural
moduli slightly decreased due to the toughening
effect of the chain extender on the pCBT matrix. Drop
weight impact tests revealed that the energy absorption
of the modified composites was relatively higher
as compared to unmodified pCBT composites. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
-Àrees temàtiques de la UPC::Enginyeria dels materials::Materials compostos
-Carbon fibers--Testing
-Composite materials--Testing
-Composite materials--Thermal properties
-Carboni
-Materials compostos -- Proves
-Materials compostos -- Propietats tèrmiques |
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Rights:
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Document type:
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Article - Submitted version
Article |
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