Designing and Characterization of Biodegradable Multiblock Poly(L-Lactic Acid)/Polybutadiene Elastomers |
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| Authors: | Mingli Jiao Kai Yang Wangxi Zhang Wei Pan Ruiwen Zhang Si Xie |
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| Institution: | 1. School of Materials and Chemical Engineering, Zhongyuan University of Technology , Zhengzhou, P.R. China;2. School of Fashion, Zhongyuan University of Technology , Zhengzhou, P.R. China;3. College of Material Science and Engineering, Doughua University , Shanghai, P.R. China |
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| Abstract: | A series of poly(L-lactic acid)/polybutadiene (PLA/PB) biodegradable multiblock elastomers was synthesized and characterized. A two-step process to prepare PLA/PB multiblock elastomers was applied. Melt polymerization was used to prepare poly(L-lactic acid) (PLA) terminated with hydroxyl groups and, at the same time, hydroxyl-terminated polybutadiene (HTPB) and 1,6-hexamethylene diisocyanate (HDI) were employed to synthesize diisocyanate-terminated polybutadiene (ITPB). Then, PLA and ITPB were reacted with different PLA/PB weight ratios. Consequently, a series of PLA/PB biodegradable poly(ester-urethane)s with crosslinked chains was obtained. Swelling characteristics and crosslink density of the crosslinked elastomer were investigated. DMA was applied to characterize its thermal properties. The measurement of mechanical properties showed that a PLA/PB elastomer with adjustable mechanical properties was synthesized. Micromorphology, hydrophobicity, and degradability of the material were also characterized. |
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| Keywords: | biodegradable elastomers morphology physical properties poly(L-lactic acid) polybutadiene |
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