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Title:
POLYLACTIC ACID GRAFT COPOLYMER, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/142919
Kind Code:
A1
Abstract:
The present invention belongs to the technical field of polymer synthesis, and particularly relates to a polylactic acid graft copolymer, and a preparation method therefor and the use thereof. The polylactic acid graft copolymer is characterized in that the polylactic acid graft copolymer contains a repeating structural unit of a structure as shown in formula (A), wherein R1 is H or a grafting group, and at least part of the R1 in the repeating structural unit is a grafting group. In addition, the right-angle tearing strength of the polylactic acid graft copolymer is not less than 120 kN/m, and preferably 135-150 kN/m; and the elongation at break is not less than 30%, and preferably 35-45%. The grafting efficiency of the polylactic acid graft copolymer prepared by adopting the method disclosed in the technical solution of the present invention is greatly improved; the toughness, elongation at break and glass transition temperature of a polylactic acid material are improved; and a prepared grafting-modified polylactic acid copolymerization material can be green and fully biodegradable.

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Inventors:
ZHANG LEI (CN)
QIAO KAI (CN)
BAI FUDONG (CN)
SUN QIMEI (CN)
BAI YULI (CN)
LI LANPENG (CN)
Application Number:
PCT/CN2023/070327
Publication Date:
August 03, 2023
Filing Date:
January 04, 2023
Export Citation:
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Assignee:
CHINA PETROLEUM & CHEM CORP (CN)
SINOPEC DALIAN RES INSTITUTE OF PETROLEUM AND PETROCHEMICALS CO LTD (CN)
International Classes:
C08G63/78; C08G63/08; C08G64/18
Domestic Patent References:
WO1997047670A11997-12-18
Foreign References:
CN105315412A2016-02-10
CN113402867A2021-09-17
CN109456487A2019-03-12
CN113881057A2022-01-04
US20090326152A12009-12-31
US20150284497A12015-10-08
US20150307686A12015-10-29
US20160108163A12016-04-21
US9193818B12015-11-24
Attorney, Agent or Firm:
RUNPING & PARTNERS (CN)
Download PDF:
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