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Monitoring the Chemical Heterogeneity and the Crystallization Behavior of PP‐ g ‐PS Graft Copolymers Using SEC‐FTIR and CRYSTAF
Author(s) -
Macko Tibor,
Schulze Ulrich,
Brüll Robert,
Albrecht Andreas,
Pasch Harald,
Fónagy Tamás,
Häussler Liane,
Iván Béla
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200700398
Subject(s) - copolymer , crystallization , fourier transform infrared spectroscopy , styrene , propene , polymer chemistry , branching (polymer chemistry) , homogeneity (statistics) , materials science , chemistry , polymer , chemical engineering , catalysis , organic chemistry , composite material , statistics , mathematics , engineering
Graft copolymers of propene with styrene were analyzed with regard to their chemical heterogeneity using both SEC coupled to FT‐IR spectroscopy and CRYSTAF. The SEC‐FTIR indicates chemical homogeneity of the copolymer samples. The decrease in crystallization temperature in CRYSTAF does not correlate with the concentration of PS in the samples but it correlates decisively with the branching frequency. The length of the PS branches does not influence the crystallization temperature in CRYSTAF, although the longest branches in the individual samples were 44 times longer than the shortest ones.