| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5204388 | Polymer Degradation and Stability | 2006 | 8 Pages |
Abstract
Effect of preheating of stearates on the processing and post-processing thermal stability of poly(vinyl chloride) compounds, plasticized with di(2-ethylhexyl) phthalate (DEHP) and epoxidized soybean oil (ESO), using several ratios of calcium/zinc stearates and DEHP/ESO is reported. The compounds were prepared as follows: (1) dry-blending the compound components, (2) pelletizing the dry-blend and (3) extruding the pellets to obtain a ribbon geometry. Processing stability was determined by: (a) mechanical characterization and (b) visual color comparison of extruded samples. Post-processing thermal stability was followed by: (a) measurement of HCl release from heated pellets and (b) color changes in heated ribbon samples. From a practical point of view, the preheating has a negligible effect on the initial color of formulations; except for the case of formulations without both ESO and CaSt2. However, the effect of the preheating on the post-processing thermal stability is strongly determined by the composition formulation.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Luis J. González-Ortiz, Martin Arellano, M. Judith Sánchez-Peña, Eduardo Mendizábal, Carlos F. Jasso-Gastinel,