Brittle-Ductile Transition in Reactive PBT/SAN Blends |
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| Authors: | Saisamorn Lumlong Keiichi Kuboyama Tsuneo Chiba Toshiaki Ougizawa |
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| Institution: | Graduate School of Science and Engineering, Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan. Fax:(+81) 3 5734 2423 |
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| Abstract: | Toughening of reactive poly(butylene terephthalate) (PBT)/styrene-acrylonitrile copolymer (SAN) blends was studied. PBT/SAN with glycidyl methacrylate (SAN-GMA) (70/30) behaved in ductile manner on tensile test, while PBT/SAN (70/30) blend failed in brittle manner. Additionally, polymethylene (phenylene isocyanate)] (PMPI) was added to the PBT/SAN-GMA blend, where it was expected that PMPI would assist the reaction between PBT and SAN-GMA, and then the strain at break was improved. PBT/SAN/PMPI (70/30/4) also behaved in ductile manner, although the interfacial adhesion strength between matrix and dispersed phase was extremely weaker than that in PBT/SAN-GMA blend. From the results, it was found that PMPI acted as a compatibilizer without copolymer formation at the interface and then PBT/SAN behaved in ductile manner in higher SAN content by PMPI effect. |
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| Keywords: | blends brittle-ductile transition PBT PMPI SAN |
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