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The effect of additives on the crystallization of poly (butylene terephthalate)
Author(s) -
Pi Chang Eng,
Kirsten Rudolf O.,
Slagowski Eugene L.
Publication year - 1978
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.760181205
Subject(s) - crystallinity , crystallization , materials science , quenching (fluorescence) , chemical engineering , fire retardant , nucleation , water of crystallization , nitrogen , polymer chemistry , composite material , organic chemistry , chemistry , physics , quantum mechanics , engineering , fluorescence
The effect of glass fibers and some fire retardant additives on the kinetics and mechanism of crystallization of poly(butylene terephthalate) (PBT) has been investigated. Shorter half times of crystallization and higher optimum crystallization temperatures of the filled samples are attributed to the nucleating ability of the additives. Based on the percent crystallinity determined, the efficiency of the different quenching media studied can be arranged in the order: ice water > 25°C water ⩾ dry ice/ethanol > liquid nitrogen. The inefficient quenching of dry ice/ethanol arid liquid nitrogen media is attributed to their poor heat transfer. The T g of these quenched samples is, however, independent of the percent crystallinity.