

FOLLOWUS
a.Key Laboratory of Polymer Ecomaterials, Chinese Academy of Sciences, Changchun Institute of Applied Chemistry, Changchun 130022, China
b.University of Science and Technology of China, Hefei 230026, China
c.Zhejiang Zhongke Applied Chemistry Technology Co., Ltd., Hangzhou 310000, China
ljhan@ciac.ac.cn
Received:14 January 2020,
Revised:2020-3-4,
Accepted:05 March 2020,
Online First:19 May 2020,
Published:16 June 2020
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Wang, X. Y.; Pan, H. W.; Jia, S. L.; Cao, Z. W.; Han, L. J.; Zhang, H. L.; Dong, L. S. Mechanical properties, crystallization and biodegradation behavior of the polylactide/poly(3-hydroxybutyrate-, co,-4-hydroxybutyrate)/poly(butylene adipate-, co,-terephthalate) blown films. Chinese J. Polym. Sci. 2020, 38, 1072–1081
Xiang-Yu Wang, Hong-Wei Pan, Shi-Ling Jia, et al. Mechanical Properties, Crystallization and Biodegradation Behavior of the Polylactide/Poly(3-hydroxybutyrate-
Wang, X. Y.; Pan, H. W.; Jia, S. L.; Cao, Z. W.; Han, L. J.; Zhang, H. L.; Dong, L. S. Mechanical properties, crystallization and biodegradation behavior of the polylactide/poly(3-hydroxybutyrate-, co,-4-hydroxybutyrate)/poly(butylene adipate-, co,-terephthalate) blown films. Chinese J. Polym. Sci. 2020, 38, 1072–1081 DOI: 10.1007/s10118-020-2418-6.
Xiang-Yu Wang, Hong-Wei Pan, Shi-Ling Jia, et al. Mechanical Properties, Crystallization and Biodegradation Behavior of the Polylactide/Poly(3-hydroxybutyrate-
Polylactide (PLA)
poly(3-hydroxybutyrate-
co
-4-hydroxybutyrate) (P(3HB-
co
-4HB))
and poly(butylene adipate-
co
-terephthalate) (PBAT) ternary blends were prepared by extrusion blending. The biodegradable PLA/P(3HB-
co
-4HB)/PBAT films were successfully obtained by using blown films technique. Excellent stiffness-toughness balance was achieved for 55/10/35 PLA/P(3HB-
co
-4HB)/PBAT film. The tensile strength reached 33.0 MPa (MD) and 23.5 MPa (TD)
the elongation at break exceeded 130 %
and tear strength exceeded 110 kN/m. The Young′s modulus as low as about 1800 MPa also met packaging applications. SEM observations revealed rough and long ligaments
indicating that the tear specimens were broken yieldingly. The addition of PBAT elastomers was the main reason for the improved toughness of the film. From DMA and SEM analysis
it was demonstrated that PLA
P(3HB-
co
-4HB)
and PBAT were partially compatible. With increasing P(3HB-
co
-4HB) content
the melt and cold crystallization of PLA was promoted. The enzymatic degradation experiments indicated that the films had good biodegradability. These findings gave important implications for designing and manufacturing biodegradation package of high biological carbon content.
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