On toughness and stiffness of poly(butylene terephthalate) with epoxide-containing elastomer by reactive extrusion
Yu, Zhong-Zhen, Yan, Cheng, Dasari, Aravind, Dai, Shaocong, Mai, Yiu-Wing, & Yang, Mingshu (2004) On toughness and stiffness of poly(butylene terephthalate) with epoxide-containing elastomer by reactive extrusion. Macromolecular Materials and Engineering, 289(8), pp. 763-770.
To obtain a balance between toughness (as measured by notched impact strength) and elastic stiffness of poly(butylene terephthalate) (PBT), a small amount of tetrafunctional epoxy monomer was incorporated into PBT/ [ethylene/methyl acrylate/glycidyl methacrylate terpolymer (E-MA-GMA)] blends during the reactive extrusion process. The effectiveness of toughening by E-MA-GMA and the effect of the epoxy monomer were investigated. It was found that E-MA-GMA was finely dispersed in PBT matrix, whose toughness was significantly enhanced, but the stiffness decreased linearly, with increasing E-MA-GMA content. Addition of 0.2 phr epoxy monomer was noted to further improve the dispersion of E-MA-GMA particles by increasing the viscosity of the PBT matrix. While use of epoxy monomer had little influence on the notched impact strength of the blends, there was a distinct increase in the elastic stiffness. SEM micrographs of impact-fracture surfaces indicated that extensive matrix shear yielding was the main impact energy dissipation mechanism in both types of blends, with or without epoxy monomer, and containing 20 wt. or more elastomer.
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|Item Type:||Journal Article|
|Keywords:||blends, fracture, poly(butylene terephthalate), reactive extrusion, toughness|
|Subjects:||Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Polymers and Plastics (091209)
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
|Copyright Owner:||Copyright 2004 John Wiley & Sons|
|Copyright Statement:||The definite version is available on publication at www3.interscience.wiley.com|
|Deposited On:||19 Apr 2007|
|Last Modified:||29 Feb 2012 13:22|
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