期刊
COMPOSITES PART B-ENGINEERING
卷 53, 期 -, 页码 187-192出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2013.04.062
关键词
Polymer matrix composites (PMCs); Adhesion; Fracture toughness; Hyperbranched
资金
- MIUR within the Project FIRB - MANTA
A novel hyperbranched poly(amide-ester)s (HBP) has been synthesized through the AB(2) approach in one-step polycondensation without solvents. The synthesized HBP has been characterized and used as filler for epoxy resin with the aim obtain materials which exhibit improved toughness. Composites containing 6% and 12% wt/wt of HBP in diglycidylether of bisphenol A (DGEBA) were produced and characterized. Results obtained from DMA tests showed that HBP has good compatibility with the epoxy resin. Impact tests proved that composites containing 12% HBP showed an improvement of about 25% on impact strength with respect to neat DGEBA. Moreover, adhesive properties were evaluated in terms of the lap-shear strength value of composite joints bonded using the investigated blend. Results showed an improvement of shear strength value of DGEBA added with 12% HBP with respect to neat DGEBA. The water uptake behavior was also evaluated. (C) 2013 Elsevier Ltd. All rights reserved.
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