Premium
Study of PVC degradation using a fast computer scanning procedure
Author(s) -
Bacaloglu Radu,
Stewen Ulrich
Publication year - 2001
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.10283
Subject(s) - degradation (telecommunications) , sensitivity (control systems) , materials science , monomer , double bond , chemical engineering , composite material , polymer , computer science , polymer chemistry , electronic engineering , telecommunications , engineering
A computer scanning procedure for the determination of total double‐bond concentration resulting from PVC degradation is described. It is fast, fully automated, and has a very high sensitivity (5 ppm of degraded monomer units). This high sensitivity makes possible the monitoring of discoloration on a very small surface and generates very large amounts of experimental data allowing corrections for inhomogeneities and surface irregularities. The measured extinctions (E rgb ) correlate with the concentrations of double bonds and allow the estimation of degradation rates. The measuring of stabilization times and the reaction rates of stabilizers with allylic chlorides and HCI offers the capability to optimize the PVC stabilization.