Preparation and characterization of acidified chitosan immobilized in epoxidized natural rubber |
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| Affiliation: | 1. Learning Institute, King Mongkut''s University of Technology Thonburi, Bangkok 10140, Thailand;2. Cellulose and Bio-based Nanomaterials Research Group, King Mongkut''s University of Technology Thonburi, Bangkok 10140, Thailand;3. Program of Petrochemical and Polymer Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;4. Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;5. Center of Excellence in Green Materials for Industrial Application, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;6. Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok 10330, Thailand |
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| Abstract: | Biocomposites comprising chitosan (CTS) trapped in an epoxidized natural rubber (ENR) was prepared by homogenizing CTS in ENR50 (ENR with about 50% epoxy content) latex in the presence of curing agents and acetic acid. Micrographs of CTS-t-ENR reveal no phased-out entity. Infrared spectra of CTS-t-ENR show only vibrational bands belonging to CTS and ENR, affirming that the former was not bonded but immobilized in the matrix of the latter. CTS loading up to 5 phr resulted in the increase in the tensile strength and elongation at break, modulus of the CTS-t-ENR. Thermal stability of CTS-t-ENR is higher than that of CTS but lower than that of ENR. Increase in CTS loading from 2.5 to 20 phr resulted in the decrease in toluene absorbency but increase in water uptake of CTS-t-ENR. |
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| Keywords: | Chitosan Epoxidized natural rubber Immobilized |
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