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Structural characterization of α‐ and β‐nucleated isotactic polypropylene
Author(s) -
Romankiewicz Anna,
Sterzynski Tomasz,
Brostow Witold
Publication year - 2004
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.1632
Subject(s) - tacticity , nucleation , materials science , crystallization , polymer chemistry , hexagonal crystal system , sorbitol , polypropylene , amide , chemical engineering , haze , morphology (biology) , polymer science , chemistry , organic chemistry , polymer , crystallography , composite material , polymerization , biology , engineering , genetics
Modification of isotactic polypropylene (iPP) with two nucleation agents, namely 1,3:24‐bis(3,4‐dimethylobenzylideno) sorbitol (DMDBS) (α‐nucleator) and N , N ′‐dicyclohexylo‐2,6‐naphthaleno dicarboxy amide (NJ) (β‐nucleator), leads to significant changes of the structure, morphology and properties. Both nucleating agents cause an increase in the crystallization temperature. The efficiency determined in a self‐nucleation test is 73.4 % for DMDBS and 55.9 % for NJ. The modification with NJ induces the creation of the hexagonal β‐form of iPP. The addition of DMDBS lowers the haze of iPP while the presence of NJ increases the haze. Copyright © 2004 Society of Chemical Industry