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Catalyzed Nucleation of Poly (Vinyl Chloride)
Author(s) -
Dobreva A.,
Gantcheva T.,
Gutzow I.
Publication year - 1992
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170270602
Subject(s) - crystallization , nucleation , cyclohexanone , materials science , vinyl chloride , chemical engineering , polymer chemistry , amorphous solid , polymer , solvent , chemistry , catalysis , organic chemistry , composite material , copolymer , engineering
Microscopically visible crystallization in a typical non‐crystallizing organic polymer ‐ poly(vinyl chloride) (PVC) is achieved by dissoloving it in an appropriate solvent (cyclohexanone) and inducing the nucleation by introducing various insolube crystallization cores ‐ microcrystals of noble metals (Au, Pd, Pt, Rh, Ir, Ru, Os). It is established that the higher the melting temperature of the metal the higher its activity as a crystallization core in the heterogeneous nucleation of PVC. The reverse process‐oriented crystallization of a foreign substance ‐ NaCl crystals on PVC films is also demonstrated. This result gives an indication of precrystalline structures in seemingly amorphous PVC films.