期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 140, 期 21, 页码 -出版社
WILEY
DOI: 10.1002/app.53884
关键词
blends; heat resistance; hydrolytic degradation; poly(butylene succinate-co-adipate); stereocomplex poly(lactic acid)
In this study, a novel and environmentally friendly PBSA/sc-PLA blend was obtained by melt-blending equimolar amounts of PLLA and PDLA with PBSA. The formation of sc-PLA in the PBSA matrix was confirmed by differential scanning calorimetry and wide-angle X-ray diffractometry, and the sc-PLA was uniformly dispersed in the PBSA matrix. The addition of sc-PLA increased the strength, heat resistance, and hydrolytic degradation resistance of the PBSA matrix, providing an effective strategy to improve the performance and expand the application scope of PBSA materials.
In this study, equimolar amounts of poly(l-lactic acid) (PLLA) and poly(d-lactide acid) (PDLA) were melt-blended with PBSA, to obtain a novel and environmentally friendly PBSA/sc-PLA blend, through in situ formation of stereo-complex poly(lactic acid) (sc-PLA). Differential scanning calorimetry and wide-angle X-ray diffractometry confirmed the formation of sc-PLA in PBSA matrix. The sc-PLA was uniformly dispersed in PBSA matrix. Up to 20 wt% sc-PLA concentration, the PBSA/sc-PLA blends showed solid-like flow behavior in the low-frequency region. Moreover, sc-PLA could reinforce the PBSA matrix. The Young's modulus, yield strength, and storage modulus of PBSA/sc-PLA blend increased with increase in sc-PLA content. In addition, the heat deflection temperatures of PBSA/sc-PLA blends increased on incorporation of sc-PLA, thus enhancing the heat resistance. Compared with neat PBSA, the hydrolytic degradation of PBSA/sc-PLA blends was improved. This work provides an effective strategy to obtain high performance PBSA materials and expand the application scope of PBSA.
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