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Crystallization characteristics of intercalated poly( L ‐lactide)/organo‐modified montmorillonite hybrids
Author(s) -
Nam Pham Hoai,
Ninomiya Naoya,
Fujimori Atsuhiro,
Masuko Toru
Publication year - 2006
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20436
Subject(s) - organoclay , crystallization , montmorillonite , materials science , nucleation , miscibility , crystallite , chemical engineering , polymer chemistry , composite material , polymer , organic chemistry , chemistry , engineering , metallurgy
The crystallization behavior of intercalated Poly( L ‐lactide) (PLLA)/organo‐modified montmorillonite hybrids has been investigated in term of growth of spherulites and bulk crystallization. The PLLA hybrids were prepared via melt‐compounding between PLLA and montmorillonite organo‐modified (organoclay) with two different types of ammonium salts: trimethyl octadecyl‐ or bis(4‐hydroxy butyl) methyl octadecyl ammonium salts. The nucleation rate of PLLA crystallites is slightly enhanced by natural clay, while reduced by organoclay due to the shielding effect and/or miscibility between surfactants of clays and PLLA chains. The incorporation of small amount of organoclay in PLLA matrix shows a tendency to reduce slightly the growth rate and the overall crystallization rate of PLLA crystallites. The secondary nucleation theory was utilized to discuss the crystallization behavior of these hybrids. POLYM. ENG. SCI., 46:39–46, 2006. © 2005 Society of Plastics Engineers