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Activity of substrates in the catalyzed nucleation of poly(ethylene terephthalate) melts
Author(s) -
Dobreva A.,
Alonso M.,
Gonzalez M.,
De Saja J. A.
Publication year - 1997
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19970118)63:3<349::aid-app10>3.0.co;2-w
Subject(s) - differential scanning calorimetry , nucleation , materials science , substrate (aquarium) , surface energy , ethylene , crystallization , activation energy , polymer chemistry , chemical engineering , poly ethylene , adhesion , catalysis , composite material , chemistry , thermodynamics , organic chemistry , physics , oceanography , engineering , geology
The activity, Φ of AgBr, AgI, PbF 2 , Ag 2 S, LiF, and CaF 2 in the catalyzed nucleation of poly(ethylene terephthalate) (PET) melts was determined using a nonisothermal differential scanning calorimetry (DSC) technique. A comparison with existing experimental data was made. It is established that the higher the melting temperature of the substrate the lower its activity as a crystallization core in the heterogeneous nucleation of PET. The lateral surface energy, σ, the end surface energy, σ e , the adhesion energy, β, and the difference between the surface energies at the substrate/melt, σ sf , substrate/deposit, σ * , and the total energy of misfit dislocations, E d [i.e., σ sf ‐ (σ * ‐ E d )] were calculated. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 63: 349–353, 1997