Epitaxial crystallization of polymers onto benzoic acid: polyethylene and paraffins, aliphatic polyesters and polyamides

J.C. Wittman, A. M. Hodge, B. Lotz

Research output: Contribution to journalArticle

Abstract

Epitaxial crystallization of polyethylene, n-paraffins, aliphatic polyesters, and various polyamides has been achieved on benzoic acid crystal substrates, specifically on their (001) crystals faces, which are made up of the aromatic rings. The epitaxial relationship is very similar for all polymers investigated: it is characterized by a unique chain orientation (parallel to the b axis of the substrate) and a plane of contact which is either the b-c, plane of polyethylene, or crystallographically similar ones for polyesters, or the plane of the hydrogen-bonded sheet for polyamides. Since benzoic acid is structurally similar to its alkali-metal salts, it is inferred that the nucleating efficiency of the latter toward chemically different but structurally similar polymers may well rest on an epitaxial relationship. Finally, the highly oriented morphology made it possible, for some polyesters with a monoclinic cell, to determine the angle between the chain axis and the Z axis of the optical indicatrix, a quantity not measured so far in polymers
Original languageEnglish
Pages (from-to)2495-2509
Number of pages15
JournalJournal of Polymer Science Part A-2: Polymer Physics
Volume21
Issue number12
DOIs
Publication statusPublished - 1 Dec 1983

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Benzoic acid
Polyamides
Paraffins
Polyethylenes
Polyesters
Crystallization
Polymers
Crystals
Alkali metals
Substrates
Salts
Hydrogen

Keywords

  • crystals
  • epitaxial growth
  • organic compunds
  • surfaces
  • paraffins
  • polyesters
  • benzoic acid
  • polymers

Cite this

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title = "Epitaxial crystallization of polymers onto benzoic acid: polyethylene and paraffins, aliphatic polyesters and polyamides",
abstract = "Epitaxial crystallization of polyethylene, n-paraffins, aliphatic polyesters, and various polyamides has been achieved on benzoic acid crystal substrates, specifically on their (001) crystals faces, which are made up of the aromatic rings. The epitaxial relationship is very similar for all polymers investigated: it is characterized by a unique chain orientation (parallel to the b axis of the substrate) and a plane of contact which is either the b-c, plane of polyethylene, or crystallographically similar ones for polyesters, or the plane of the hydrogen-bonded sheet for polyamides. Since benzoic acid is structurally similar to its alkali-metal salts, it is inferred that the nucleating efficiency of the latter toward chemically different but structurally similar polymers may well rest on an epitaxial relationship. Finally, the highly oriented morphology made it possible, for some polyesters with a monoclinic cell, to determine the angle between the chain axis and the Z axis of the optical indicatrix, a quantity not measured so far in polymers",
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author = "J.C. Wittman and Hodge, {A. M.} and B. Lotz",
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volume = "21",
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Epitaxial crystallization of polymers onto benzoic acid: polyethylene and paraffins, aliphatic polyesters and polyamides. / Wittman, J.C.; Hodge, A. M.; Lotz, B.

In: Journal of Polymer Science Part A-2: Polymer Physics, Vol. 21, No. 12, 01.12.1983, p. 2495-2509.

Research output: Contribution to journalArticle

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