Premium
Estimating crystallinity in high density polyethylene fibers using online Raman spectroscopy
Author(s) -
Paradkar R. P.,
Sakhalkar S. S.,
He X.,
Ellison M. S.
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.11719
Subject(s) - crystallinity , raman spectroscopy , high density polyethylene , polyethylene , differential scanning calorimetry , materials science , orthorhombic crystal system , phase (matter) , analytical chemistry (journal) , composite material , optics , chemistry , crystal structure , thermodynamics , crystallography , organic chemistry , physics
Online Raman spectra, obtained at different points along the spin line during pilot‐scale nonisothermal melt spinning of high density polyethylene (HDPE) fibers, are presented for the first time. The fraction of the crystalline phase corresponding to each spectrum was determined from the normalized integrated intensity of the 1418 cm −1 Raman band. It is well established that this band represents the orthorhombic crystalline phase in polyethylene. The estimates of percent crystallinity obtained from decomposition of the Raman spectrum were compared with the percent crystallinity from differential scanning calorimetry (DSC) measurements. It is concluded that online Raman spectroscopy can be successfully used to monitor the development of crystallinity in HDPE fibers as a function of distance from the spinneret. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 545–549, 2003