Premium
Crystallization and spherulitic growth kinetics of poly(trimethylene terephthalate)/polycarbonate blends
Author(s) -
Shafee Ez El,
Naguib Halla F.,
Li Longfei,
Jiang Shichun,
An Lijia
Publication year - 2010
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.21489
Subject(s) - crystallization , materials science , differential scanning calorimetry , nucleation , polycarbonate , polymer chemistry , chemical engineering , kinetics , avrami equation , crystallization of polymers , composite material , thermodynamics , physics , quantum mechanics , engineering
The macroscopic and microscopic melt‐crystallization kinetics of poly(trimethylene terphthalate) (PTT)/polycarbonate (PC) blends have been measured by differential scanning calorimetry (DSC), and optical microscopy (OM). The results are analyzed in terms of the Avrami equation and the Hoffman–Lauritzen crystallization theory (HL model). Blending with PC did not change the crystallization mechanism of PTT, but reduced the crystallization rate compared with that of neat PTT at the same crystallization temperature. The crystallization rate decreased with increasing crystallization temperature. The spherulitic morphology of PTT was influenced apparently by the crystallization temperature and by the addition of PC. X‐ray diffraction shows no change in the unit cell dimension of PTT was observed after blending. Through the HL theory, the classical regime II→III transition was detected for the neat PTT and the blends. The nucleation parameter ( K g ), the fold‐surface free energy (σ e ), and the work of chain folding ( q ) were calculated. Blending with PC decreased all the aforementioned parameters compared with those of neat PTT. POLYM. ENG. SCI., 2010. © 2010 Society of Plastics Engineers