We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Fully bio-based poly(ɛ-capolactone)/poly(lactide) alternating multiblock supramolecular polymers: Synthesis, crystallization behavior, and properties.
- Authors
Shi, Xuetao; Jing, Zhanxin; Zhang, Guangcheng; Xu, Yan; Yao, Yao
- Abstract
ABSTRACT Supramolecular poly(ɛ-capolactone)/poly(lactide) alternating multiblock copolymers were prepared by UPy-functionalized poly(lactide) -b-poly(ɛ-capolactone) -b-poly(lactide) copolymers. The prepared supramolecular polymers (SMPs) exhibit the characteristic properties of thermoplastic elastomers. The stereo multiblock SMPs (sc-SMPs) were formed by blending UPy-functionalized poly( l-lactide) -b-PCL -b-poly( l-lactide) ( l-SMPs) and UPy-functionalized poly( d-lactide) -b-PCL -b-poly( d-lactide) ( d-SMPs) due to stereocomplexation of the PLLA and PDLA blocks. Sc-SMPs with low content of d-SMPs (≤20%) are transparent, elastic solids, while those having high d-SMPs content are opaque, brittle solids. The effects of l-SMPs/ d-SMPs mixing ratios on thermal, crystallization behaviors, crystal structure, mechanical and hydrophilic properties of sc-SMPs were deeply investigated. The incorporation of UPy groups depresses the crystallization of polymer, and the stereocomplex formation accelerates the crystallization rate. The used initiator functionalized polyhedral oligomeric silsesquioxanes causes a different effect on the crystallization of PLA and PCL blocks. The tensile strength and elongation at break of l d/ d d-SMPs ( d represents the initiator diethylene glycol) are significantly larger than that of l p/ d p-SMPs ( p represents the initiator polyhedral oligomeric silsesquioxanes), and their heat resistance and hydrophilicity can be also modulated by the l-SMPs/ d-SMPs mixing ratios and the different initiators. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45575.
- Subjects
SUPRAMOLECULAR polymers synthesis; LACTIDES; CRYSTALLIZATION; COPOLYMERS; CRYSTAL structure
- Publication
Journal of Applied Polymer Science, 2017, Vol 134, Issue 48, pn/a
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.45575