Stabilization of rigid poly(vinyl chloride) by 5,6,7,8‐Tetrahydro‐2‐mercapto‐4‐(p‐methoxyphenyl)‐3‐quinolinecarbonitrile

Abstract

The chemical 5,6,7,8-Tetrahydro-2-mercapto-4-(p-metho~phenyl)-3-quinolinecarbonitrile (TMQC) has been investigated as a thermal stabilizer for rigid poly(viny1 chloride) (PVC) at 180°C in air. The results reveal the higher stabilizing efficiency of the investigated material, as shown by the longer induction period obtained in its presence relative to those produced by commonly used industrial stabilizers. Ultraviolet irradiation of the polymer stabilized by TMQC gives a lower extent of discoloration compared to that of unstabilized PVC. Reaction of TMQC with the polymer in solution also has been studied in order to investigate the mechanism of stabilization.

Glucoside/(UV absorber) mixtures as photostabilizers for rigid PVC

“…Moreover, many other organic compounds, such as hydroxybenzylthioethers [6] and mercapto derivatives of quinoline carbonitrile [7], have been used as thermal and light stabilizers. When the phenyl salicylate UV absorber was blended with N-(substituted phenyl)itaconimide derivatives and the mixtures were investigated as photostabilizers for Poly(vinyl chloride) (PVC), a synergistic effect was observed [8].…”

Improvement of Thermal Properties of Poly(vinyl chloride) Using Chemical Blending Assisted Ultrasonic Technique

“…To overcome the accumulation of these heavy metals, organic based stabilizers were used as additives [6,7] or modifying agents [8,9]. Moreover, polymer blend technique is also considered as effective and commercial method to stabilize such a polymer [10][11][12][13], these stabilizers are environmentally accepted [14,15]. The aim of this work is to stabilize poly(vinyl chloride) by blending it with suitable biodegradable polymers through their amorphous regions to improve its thermal stability to enable the adjustment of poly(vinyl chloride) for plastics applications [16,17].…”

Thermal, structural, and optical properties of γ‐irradiated poly(vinyl alcohol)/poly(ethylene glycol) thin film

“…In spite of its enormous technical and economic importance, PVA is still in need to enhance its thermal stability due to the structure defects that may be formed during the polymerization process 2. Therefore, the stabilization of PVA polymer using variety of additives is required 3. Organic materials as additives are of advantage, as being metal‐free and environmentally acceptable 4–6…”