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Crystallization kinetics of native (pure) and commercial gutta percha (transpolyisoprene) and the influence of metal salts, oxides, ‘thermoplast’ and colouring agents on its crystallization rate
Author(s) -
Arvanitoyannis Ioannis,
Blanshard John M. V.,
Kolokuris Ioannis
Publication year - 1992
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990270403
Subject(s) - crystallization , plasticizer , kinetics , materials science , chemical engineering , compatibility (geochemistry) , metal , nuclear chemistry , chemistry , organic chemistry , metallurgy , composite material , physics , quantum mechanics , engineering
The kinetics of crystallization of gutta percha (trans‐polyisoprene) were studied both in its native form and as the commercial product currently used for dental purposes. Mixtures of native gutta percha with selected low molecular weight substances (BaSO 4 , CdSO 4 , Bi 2 O 3 , ZnO), ‘Thermoplast’—a commercially formulated plasticizer, and colouring agents were also examined. It was shown that any incompatibility of the aforementioned substances caused an increase in the crystallization rate, while compatibility decreased the rate of crystallization.