Efficient formation of stereocomplexes of poly(L-lactide) and poly(D-lactide) by terminal Diels-Alder coupling

Poly(L‐lactide) (PLLA) and poly(D‐lactide) (PDLA) having anthracene and maleimide terminals were prepared and mixed together to induce a terminal Diels–Alder reaction providing PLLA–PDLA diblock copolymers. The resultant Diels–Alder adducts showed a sole melting peak of stereocomplex crystals around...

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Veröffentlicht in:	Polymer international 2010-11, Vol.59 (11), p.1526-1530
Hauptverfasser:	Masutani, Kazunari, Kawabata, Seiji, Aoki, Takashi, Kimura, Yoshiharu
Format:	Artikel
Sprache:	eng
Schlagworte:	Adducts anthracene Applied sciences Chemical modifications Chemical reactions and properties Copolymers Crystallization Crystals Diels-Alder reaction Diels-Alder reactions Exact sciences and technology maleimide Melting Organic polymers Physicochemistry of polymers polylactide stereocomplex Stereocomplexes Terminals
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Zusammenfassung:	Poly(L‐lactide) (PLLA) and poly(D‐lactide) (PDLA) having anthracene and maleimide terminals were prepared and mixed together to induce a terminal Diels–Alder reaction providing PLLA–PDLA diblock copolymers. The resultant Diels–Alder adducts showed a sole melting peak of stereocomplex crystals around 220 °C without homochiral crystallization. In addition to their highly improved stereocomplex formation, the adducts showed no decomposition due to the retro Diels–Alder reaction below the melting temperature of the stereocomplex crystals. Copyright © 2010 Society of Chemical Industry Poly(L‐lactide) (PLLA) and poly(D‐lactide) (PDLA) having anthracene (A) and maleimide (M) terminals were prepared and mixed together to induce terminal Diels‐Alder reaction providing a PLLA‐PDLA diblock copolymer.
ISSN:	0959-8103 1097-0126 1097-0126
DOI:	10.1002/pi.2945