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Preparation and properties of multi-branched poly(D-lactide) derived from polyglycidol and its stereocomplex blends
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Document Title
Preparation and properties of multi-branched poly(D-lactide) derived from polyglycidol and its stereocomplex blends
Author
Petchsuk A, Buchatip S, Supmak W, Opaprakasit M, Opaprakasit P
Name from Authors Collection
Affiliations
National Science & Technology Development Agency - Thailand; National Metal & Materials Technology Center (MTEC); Chulalongkorn University; Thammasat University
Type
Article
Source Title
EXPRESS POLYMER LETTERS
ISSN
1788-618X
Year
2014
Volume
8
Issue
10
Page
779-789
Open Access
gold
Publisher
BUDAPEST UNIV TECHNOL & ECON
DOI
10.3144/expresspolymlett.2014.80
Format
Abstract
Multi-branched poly(D-lactide)s (mbPDLAs) with various structures are synthesized via ring-opening polymerization by using polyglycidol (PG) macro-initiators. Their chemical structures and thermal properties are controlled by adjusting feed ratios of D-lactide (DLA) and PG. The materials are blended with commercial linear poly(L-lactide) (l-PLLA) to form a stereocomplex structure. Effects of mbPDLAs structures and l-PLLA/mbPDLA ratios on the blends' thermal, mechanical, and rheological properties are evaluated. Mechanical properties of the stereocomplex blends, especially elongation at break and toughness, are dependent on the blend compositions, in which a 90:10 ratio exhibits the most desirable properties. The material also exhibits the lowest complex viscosity, which provides easy processing conditions. This is achieved by the incorporation of copolymers with multi-branched structures and an ability to form a much stronger stereocomplex structure.
Keyword
multi-branched | polyglycidol | polylactide | polymer blends and alloys | stereocomplex
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Funding Sponsor
National Metal and Materials Technology Center; National Research Council of Thailand (NRCT); Center of Excellence in Material Science, Construction, and Maintenance Technology, Thammasat University
Publication Source
WOS