Annealing effects on structural changes and thermal shrinkage of poly(lactic acid) draw-textured filaments

Title
Annealing effects on structural changes and thermal shrinkage of poly(lactic acid) draw-textured filaments
Author(s)
오태환서영호한성수길명섭[길명섭]
Keywords
MECHANICAL-PROPERTIES; POLY(L-LACTIC ACID); FIBERS; POLY(ETHYLENE-TEREPHTHALATE); MICROSTRUCTURE; BEHAVIOR; SPEED; PHASE
Issue Date
201405
Publisher
TAYLOR & FRANCIS LTD
Citation
JOURNAL OF THE TEXTILE INSTITUTE, v.105, no.5, pp.553 - 558
Abstract
To control the thermal shrinkage of poly(lactic acid) draw-textured yarns, the annealing effects on structural changes and thermal shrinkage were investigated. Specifically, annealing temperatures of 100 and 160 degrees C and annealing times of 10-50 min per every 10 min were investigated. Differential scanning calorimetry thermograms revealed that filaments annealed at 100 degrees C produced double melting peaks due to crystal imperfections, while those annealed at 160 degrees C for more than 30 min showed a single melting peak. Moreover, wide angle X-ray scattering revealed that annealing at higher temperatures led to better developed crystal structures. Although, the crystal structure developed by annealing birefringence indicated that average molecular orientation was not greatly affected. Yarns annealed at 160 degrees C showed the least thermal shrinkage of 2%, while those annealed at 100 degrees C decreased from 7.9-5.4% with increasing annealing time.
URI
http://hdl.handle.net/YU.REPOSITORY/32282http://dx.doi.org/10.1080/00405000.2013.827390
ISSN
0040-5000
Appears in Collections:
공과대학 > 화학공학부 > Articles
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