Improved miscibility and toughness of biological poly(3-hydroxybutyrate-co-4-hydroxybutyrate)/poly (lactic acid) blends via melt-blending-induced thermal degradation,
學年 112
學期 1
出版（發表）日期 2023-09-18
作品名稱 Improved miscibility and toughness of biological poly(3-hydroxybutyrate-co-4-hydroxybutyrate)/poly (lactic acid) blends via melt-blending-induced thermal degradation,
作品名稱（其他語言）
著者 Yit Thai Ong; Ting-Min Chen; Trong-Ming Don
單位
出版者
著錄名稱、卷期、頁數 International Journal of Biological Macromolecules 253, 127001
摘要 Polymer blending has been a facile method to resolve the brittle issue of poly(lactic acid) (PLA). Yet, miscibility becomes the primary concern that would affect the synergy effect of polymer blending. This study aimed to improve the miscibility of poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P34HB) and PLA by lowering their molecular weights via a melt-blending-induced thermal degradation during mechanical mixing to form m-P34HB/PLA blends. The molecular weight of the P34HB was significantly reduced after blending, thereby improving the miscibility of the blends, as evidenced by the shift of glass transition temperatures. Also, simulation based on Flory-Huggins theory demonstrated increased miscibility with decreasing molecular weight of the polymers. Moreover, the thermal gravimetric analysis revealed that the PLA provided a higher shielding effect to the P34HB in the blends prepared by melt-blending than those by solution-blending, that the addition of PLA could retard the chain scission of P34HB and delay its degradation. The addition of m-P34HB at 20 wt% in the blend contributed to a 60-fold enhancement in the elongation at break and an increment of 4.6 folds in the Izod impact strength. The enzymatic degradation using proteinase K revealed the preferential to degrade the PLA in the blends and followed the surface erosion mechanism.
關鍵字 Biological polymer blends;Enzymatic degradation;Miscibility;Poly(3-hydroxybutyrate-co-4-hydroxybutyrate);Poly(lactic acid);Thermal degradation
語言 en
ISSN 1879-0003;0141-8130
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Trong-Ming Don
審稿制度 是
國別 NLD
公開徵稿
出版型式 ,電子版,紙本
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/124780 )