The frustrated structure of poly(L-lactide)

J. Puiggali, Y. Ikada, H. Tsuji, L. Cartier, Takumi Okihara, B. Lotz

Research output: Contribution to journalArticle

231 Citations (Scopus)

Abstract

The crystal structure formed upon stretching or stroking of poly(L-lactide) is determined by electron diffraction and conformational energy analysis. It rests on a frustrated packing of three three-fold helices in a trigonal unit-cell of parameters a = b = 1.052 nm, c = 0.88 nm, space group P32. The frustrated packing is of the type described as North-South-South (NSS). This structure appears to be formed to accommodate the random up-down orientation of neighbor chains associated with rapid crystallization conditions. This randomness introduces structural disorder (c-axis shifts and azimuthal setting of neighbor helices). The resultant streaking of the diffraction pattern is modeled. Frustrated packings observed in polymeric systems that depart from three-fold symmetry, and in pseudo-racemates of low molecular weight compounds are discussed. (C) 2000 Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)8921-8930
Number of pages10
JournalPolymer
Volume41
Issue number25
Publication statusPublished - Sep 8 2000
Externally publishedYes

Fingerprint

Crystallization
Electron diffraction
Crystal orientation
Diffraction patterns
Stretching
Crystal structure
Molecular weight
poly(lactide)

Keywords

  • Crystal structure
  • Frustration
  • Polylactide

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

Cite this

Puiggali, J., Ikada, Y., Tsuji, H., Cartier, L., Okihara, T., & Lotz, B. (2000). The frustrated structure of poly(L-lactide). Polymer, 41(25), 8921-8930.

The frustrated structure of poly(L-lactide). / Puiggali, J.; Ikada, Y.; Tsuji, H.; Cartier, L.; Okihara, Takumi; Lotz, B.

In: Polymer, Vol. 41, No. 25, 08.09.2000, p. 8921-8930.

Research output: Contribution to journalArticle

Puiggali, J, Ikada, Y, Tsuji, H, Cartier, L, Okihara, T & Lotz, B 2000, 'The frustrated structure of poly(L-lactide)', Polymer, vol. 41, no. 25, pp. 8921-8930.
Puiggali J, Ikada Y, Tsuji H, Cartier L, Okihara T, Lotz B. The frustrated structure of poly(L-lactide). Polymer. 2000 Sep 8;41(25):8921-8930.
Puiggali, J. ; Ikada, Y. ; Tsuji, H. ; Cartier, L. ; Okihara, Takumi ; Lotz, B. / The frustrated structure of poly(L-lactide). In: Polymer. 2000 ; Vol. 41, No. 25. pp. 8921-8930.
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