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Study of PVC degradation using a fast computer scanning procedure

2001; Wiley; Volume: 7; Issue: 3 Linguagem: Inglês

10.1002/vnl.10283

1548-0585

Radu Bacaloglu, Ulrich Stewen,

Inorganic and Organometallic Chemistry

Abstract 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.