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- Title
Competitive Effects of Stereocomplexation and Hyper-Conjugation of Triethoxysilyl-Terminated Poly( d-lactide) in Poly( l-lactide) matrices.
- Authors
Hyun, Jungyub; Kimura, Yoshiharu; Yamane, Hideki
- Abstract
Triethoxysilyl-terminated poly( d-lactide)s (eSi-PDLA) were successfully prepared by hydrosilylation of allyl-terminated PDLAs (A-PDLA-ac) which were readily prepared by ring-opening polymerization of d-lactide and the following terminal protection by acetylation. Their acid-catalyzed hydrolysis produced hyper-conjugated PDLAs with terminal silanol coupling. Blend PLLA films containing eSi-PDLA ( Mn = 2.1 kDa) in 5-25 wt.% were successfully prepared by the solution casting method. The blend films were found to take a nano-porous or micro-phase separation structure, being different from that of the blend PLLA films containing trimethoxysilyl-terminated poly( d-lactide) (mSi-PDLA) which exhibited particle distribution structure. This difference was reasonably attributed to the different rate of hydrolytic polycondensation of the trimethoxy- and triethoxy-silyl terminals. These results revealed that the competing sterecomplexation/ hyper-conjugation/phase separation can afford specific morphologies, allowing fine control of properties.
- Subjects
POLYLACTIC acid; BIODEGRADABLE plastics; COMPLEXATION reactions; HYDROSILYLATION; CHEMICAL reactions
- Publication
Macromolecular Materials & Engineering, 2015, Vol 300, Issue 11, p1123
- ISSN
1438-7492
- Publication type
Article
- DOI
10.1002/mame.201500157