Effect of stabilizers in the thermal treatment of PVC—XIII

Vymazal, Z.; Volka, K.; Sabaa, Magdy W.; Vymazalová, Z.

doi:10.1016/0014-3057(83)90103-9

Cited by 26 publications

(4 citation statements)

References 6 publications

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“…These stearates are commonly added to protect PVC from thermal degradation. 13,14 In this study, by the measurement of the evolving rate of HCl during the initial stage of the thermal degradation of CNR and by the determination of the amounts of the conjugated double bonds that formed in the degraded CNR, the effects of barium stearate (BaSt 2 ), lead stearate (PbSt 2 ), cadmium stearate (CdSt 2 ), calcium stearate (CaSt 2 ), and zinc stearate (ZnSt 2 ) on the thermal stability of CNR were investigated.…”

Section: Introductionmentioning

confidence: 97%

Effects of stearates on the thermal stability of chlorinated natural rubber from latex

Heping

Zhong

et al. 2005

J of Applied Polymer Sci

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The effects of stearates on the dehydrochlorination (DHC) reaction of chlorinated natural rubber (CNR) from latex were studied by the measurement of the HCl evolving rate during the early stage of the thermal degradation of CNR and by the determination of the amounts of cyclic conjugated dienes formed on the CNR molecular chains. During the early stage of the thermal degradation of CNR at 150°C, HCl was eliminated from the CNR molecular chains, and the cyclic conjugated dienes were formed on the CNR molecular chains. Under the effects of barium stearate, lead stearate, cadmium stearate, and calcium stearate, the HCl evolving rates of CNR were reduced, whereas the amounts of cyclic conjugated dienes that formed on the CNR molecular chains were increased. When zinc stearate was added, because of the formation of ZnCl 2 , which was an active catalyst of the DHC reaction of CNR, both the HCl evolving rate from CNR and the formation of cyclic conjugated dienes were increased. The results indicate that the addition of stearates can reduce the thermal stability of CNR.

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Section: Introductionmentioning

confidence: 97%

Effects of stearates on the thermal stability of chlorinated natural rubber from latex

Heping

Zhong

et al. 2005

J of Applied Polymer Sci

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“…Stabilization of the polymer using a variety of additives has been suggested. These can be metallic soaps (8)(9)(10) and esters or organic materials (11,12).…”

Section: Introductionmentioning

confidence: 99%

Molecular and optical modifications in poly(vinyl chloride) due toN-phenylmaleimide additives and gamma irradiation

Nouh

Abutalib

2011

Radiation Effects and Defects in Solids

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The effects of N -phenylmaleimide (NPMI) concentration and gamma dose on the molecular and optical properties of poly(vinyl chloride) (PVC) have been studied. The results reveal an improvement in the intrinsic viscosity of PVC in the presence of an organic material. The effective concentration that enhanced the intrinsic viscosity, from 1.02 to 1.28, was found to be 10 mmol NPMI per 100 g PVC. The effect of gamma irradiation on the PVC polymer stabilized with this concentration of NPMI has been studied. Samples from the 0.01 g NPMI/1 g PVC were irradiated with gamma doses in the range 5-180 kGy. It is found that irradiation in the dose range 120-180 kGy enhances the intrinsic viscosity of the samples. In addition, the transmission of these irradiated samples in the wavelength range 200-2500 nm, as well as any color changes was studied. The color intensity ( E) was greatly increased with the increasing gamma dose, and was accompanied by darkness with a significant increase in the yellow color component.

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“…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].…”

Section: Introductionmentioning

confidence: 99%

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

Al‐Ghamdi¹

2017

Asian J. Chem.

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The thermal stabilization of poly(vinyl chloride) through blending techniques has been studied. Poly(vinyl chloride) was blended with modified polymer (cellulose acetate-diallyl amine) in different compositions to improve the thermal stability of poly(vinyl chloride). The thermal stability and morphology of the blend films were characterized by scanning electron microscope (SEM) and thermogravimetry. The results revealed that the presence of modified cellulose acetate improved the thermal stability of poly(vinyl chloride). This was attributed to the thermal stable diallylamine moieties among the cellulose acetate chains. The addition of traces of maleimide derivatives to poly(vinyl chloride) prior to the blend process led to an extra thermal stability of the blend film as shown from the values of the initial decomposition temperature (To) measured by thermogravimetry.

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Effect of stabilizers in the thermal treatment of PVC—XIII

Cited by 26 publications

References 6 publications

Effects of stearates on the thermal stability of chlorinated natural rubber from latex

Effects of stearates on the thermal stability of chlorinated natural rubber from latex

Molecular and optical modifications in poly(vinyl chloride) due toN-phenylmaleimide additives and gamma irradiation

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

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