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Characterization of Hindered Amine Light Stabilizers in Polymer Matrix Using Terahertz Time‐Domain Spectroscopy
Author(s) -
Xie LingHai,
Dai Hao,
Jin BiaoBing,
Han Yuan,
Tai Qiang,
Yi MingDong,
Yang Tao,
Wu PeiHeng,
Huang Wei
Publication year - 2012
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201100657
Subject(s) - terahertz radiation , spectroscopy , terahertz time domain spectroscopy , terahertz spectroscopy and technology , absorption (acoustics) , absorption spectroscopy , amine gas treating , chemistry , materials science , matrix (chemical analysis) , polymer chemistry , analytical chemistry (journal) , detection limit , polymer , photochemistry , optoelectronics , organic chemistry , optics , chromatography , physics , quantum mechanics , composite material
Terahertz time‐domain spectroscopy (THz‐TDS) technique allows us to analyze plastic additives. A series of hindered amine light stabilizers (HALSs), including TMP, PMP, BB‐PMP, Chimassorb 944 and 119, and a nitroxide free radical of 4‐hydroxy‐2,2,6,6‐tetramethyl‐1‐piperidinyloxy (HTEMPO) in the matrix of high‐density polyethylene are characterized in the range of 0.2–2.6 THz. TMP, PMP, and BB‐PMP exhibit individual well‐resolved terahertz (THz) absorption spectra at room temperature. Furthermore, a linear relationship of the content of TMP versus the intensity of it first THz absorption peak are demonstrated with the detection limit of about 1.6% (w/w). In addition, PMP exhibit water‐dependent characteristic THz absorption spectra. THz‐TDS will afford a potential tool to investigate the stabilizing mechanism of HALS and monitor their evolution.