Synthesis and characterization of carboxyl-terminated poly (lactic acid) - Details

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Abstract：

The　carboxyl-terminated　modified　polylactic　acid　copolymers　of　P(LA/SA),　P(LA/CA)　and　P(LA/AC)　were　synthesized　via　directly　melt　polycondensation　with　D,　L-racemic　lactic　acid　(D,　L-LA)　as　raw　material　and　stannous　octoate　as　catalyst.　The　copolymerization　reaction　was　performed　at　the　temperature　of　168°C　and　the　pressure　of　0.098　MPa　using　linear　heating　method.　The　copolymers　were　characterized　by　viscosity-average　molecular　weight,　FT-IR,　1　H-NMR,　DSC,　TGA　and　XRD.　The　results　demonstrate　that　T　g　of　the　carboxyl-terminated　copolymers　is　lower　than　PLA,　reducing　the　rigidity　of　PLA;　the　copolymers　have　good　thermal　stability　for　one-step　thermal　decomposition;　compared　with　PLA,　the　crystallinity　of　P(LA/SA)　and　P(LA/AC)　decreased,　while　the　P(LA/CA)　slightly　decreased,　so　that,　by　adjusting　the　ratio　of　lactic　acid　and　modifier　to　adjust　the　mechanical　properties.

Keyword：

Carboxyl-terminated modification; Direct melt polycondensation; Polylactic acid; Temperature gradient

Community：

[ 1 ] [Fan, G.-D.]Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
[ 2 ] [Fan, G.-D.]Ministry of Education Key Laboratory of Analysis and Detection Technology for Food Safety, Fuzhou University, Fuzhou 350002, China
[ 3 ] [Zhang, C.-M.]Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
[ 4 ] [Lin, Z.-Y.]Ministry of Education Key Laboratory of Analysis and Detection Technology for Food Safety, Fuzhou University, Fuzhou 350002, China
[ 5 ] [Chen, C.-L.]Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
[ 6 ] [Yang, R.]Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
[ 7 ] [Li, T.-T.]Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China

Reprint 's Address：

[Fan, G.-D.]Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China

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Source ：

Journal of Functional Materials

ISSN： 1001-9731

Year： 2011

Issue： SUPPL. JUNE

Volume： 42

Page： 541-543,548

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WoS CC Cited Count： 0

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ESI Highly Cited Papers on the List： 0 Unfold All

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