Loading...
Highly toughened polylactide with novel sliding graft copolymer by in situ reactive compatibilization, crosslinking and chain extension
Li, X. Kang, H. Shen, J. Zhang, L. Nishi, T. Ito, K. Zhao, C. Coates, Philip D.
Li, X.
Kang, H.
Shen, J.
Zhang, L.
Nishi, T.
Ito, K.
Zhao, C.
Coates, Philip D.
Publication Date
2014-08-05
End of Embargo
Supervisor
Rights
© 2014 Elsevier Ltd. Full-text reproduced in accordance with the publisher’s self-archiving policy.
This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ .
Peer-Reviewed
Yes
Open Access status
Accepted for publication
2014-06-15
Institution
Department
Awarded
Embargo end date
Additional title
Abstract
The “sliding graft copolymer” (SGC), in which many linear poly-ε-caprolactone (PCL) side chains are bound to cyclodextrin rings of a polyrotaxane (PR), was prepared and employed to toughen brittle polylactide (PLA) with methylene diphenyl diisocyanate (MDI) by reactive blending. The SGC was in situ crosslinked and therefore transformed from a crystallized plastic into a totally amorphous elastomer during reactive blending. Meanwhile, PLA-co-SGC copolymer was formed at interface to greatly improve the compatibility between PLA and SGC, and the chain extension of PLA also occurred, were confirmed by FTIR, GPC, SEM, and TEM. The resulting PLA/SGC/MDI blends displayed super impact toughness, elongation at break and nice biocompatibility. It was inferred from these results the crosslinked SGC (c-SGC) elastomeric particles with sliding crosslinking points performed as stress concentrators and absorbed considerable energy under impact and tension process.
Version
Accepted Manuscript
Citation
Li X, Kang H, Shen J et al (2014) Highly toughened polylactide with novel sliding graft copolymer by in situ reactive compatibilization, crosslinking and chain extension. Polymer. 55(16): 4313-4323.
Link to publisher’s version
Link to published version
Link to Version of Record
Type
Article