Preparation and Properties of Blends from Poly(ε-caprolactone-ran-L-lactide) Random Copolymer and Amorphous Poly(lactic acid)

doi:10.11944/j.issn.1000-0518.2015.11.150117

Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (11): 1268-1274.DOI: 10.11944/j.issn.1000-0518.2015.11.150117

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Preparation and Properties of Blends from Poly(ε-caprolactone-ran-L-lactide) Random Copolymer and Amorphous Poly(lactic acid)

ZHANG Han^a^b,SUN Zhiqiang^a,PANG Xuan^a^*(),LI Shuai^a,SUN Jingru^a,CHEN Wenqi^a,CHEN Xuesi^a

^aKey Laboratory of Polymer Ecomaterials,Changchun Institute of Applied Chemistry, Chinese Academy of Sciences,Changchun 130022,China
^bUniversity of Chinese Academy of Sciences,Beijing 100049,China

Received:2015-03-26 Accepted:2015-08-18 Published:2015-11-02 Online:2015-11-02
Contact: PANG Xuan
Supported by:
Supported by the National Natural Science Foundation of China(No.51173183, No.51203155, No.51273198)

Abstract

Abstract:

Different proportions of PCL/PLLA random copolymers made from ε-caprolactone(ε-CL) and L-lactide(L-LA) were synthesized by ring-opening polymerization. Copolymers were added to PLA by melt blending to afford PLA/P(CL/LLA) blends. The compatibility, thermal and mechanical properties of the blends were studied. The results show that the compatibility of PLA and P(CL/LLA) is closely related to the average length of the lactide unit in copolymer. When the number-average length of lactide in P(CL/LLA) is longer than 3.4, the copolymer can interact with PLA very well. Caprolactone sequences can provide flexible units for the copolymer, and improve the toughness for the blends. The elongation at break of the blends can reach as high as 500%.

Key words: polylactide, ε-caprolactone, copolymer, blends, toughened, compatibility

ZHANG Han, SUN Zhiqiang, PANG Xuan, LI Shuai, SUN Jingru, CHEN Wenqi, CHEN Xuesi. Preparation and Properties of Blends from Poly(ε-caprolactone-ran-L-lactide) Random Copolymer and Amorphous Poly(lactic acid)[J]. Chinese Journal of Applied Chemistry, 2015, 32(11): 1268-1274.

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Preparation and Properties of Blends from Poly(ε-caprolactone-ran-L-lactide) Random Copolymer and Amorphous Poly(lactic acid)

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