Photodegradation of PVC stabilized by organotin compounds

Vymazal, Z.; Vymazalová, Z.

doi:10.1016/0014-3057(91)90064-u

Cited by 28 publications

(14 citation statements)

References 26 publications

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“…Low molecular weight polyethylene wax is used as a lubricant 299 in PVC extrusion, especially in the production of pipes. [300][301][302] High molecular weight polymer forms immiscible blends with PVC.…”

Section: Polyethylene Pementioning

confidence: 99%

Principles of Thermal Degradation

Wypych¹

2015

PVC Degradation and Stabilization

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Section: Polyethylene Pementioning

confidence: 99%

Principles of Thermal Degradation

Wypych¹

2015

PVC Degradation and Stabilization

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“…Also, the poor stability of PVC against some kinds of radiation is attributed to structural defects formed during polymerization (2). These defects are mainly allylic and tertiary (3)(4)(5) chlorine atoms, known as labile chlorine atoms. These labile atoms are extremely unstable and easily detached by the effect of heat (6) or even sunlight (7) to produce HCl gas, leading to the formation of polyenes and hence a high degree of discoloration of the polymer.…”

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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“…The photoageing mechanism of PVC is generally accepted that the aging proceeds primarily with a radical‐type mechanism 7–13. When a sample is exposed to sunlight, the high UV energy of sunlight absorbed by PVC is able to initiate free radicals by the breakage of chemical bonds in PVC molecules, and then activate a series of chemical reactions, such as molecular chains scission and crosslinking, hydrogen chloride elimination to form alkene or polyene linkages 7, 10, 11.…”

Section: Introductionmentioning

confidence: 99%

A novel route for preparation of PVC sheets with high UV irradiation resistance

Guo

2010

J of Applied Polymer Sci

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A novel acrylonitrile acrylate copolymer coating was proposed to improve the UV irradiation resistance of poly(vinyl chloride) (PVC) sheets. Its effect on the photoageing properties of the sheets was evaluated by means of Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), yellowness index test, and the oxygen permeability coefficient and mechanical properties measurement. The experimental results show that the novel acrylonitrile acrylate copolymer coating significantly improves the UV irradiation resistance of PVC sheets. Compared with the PVC sheets without coating, the coated PVC sheets show better mechanical properties, lower yellowness index, and smaller oxygen permeability coefficient after UV irradiation. The analysis on the SEM images of the PVC sheets indicates that the coating acts as a film to prevent the PVC sheets from UV energy and oxygen that can accelerate the photochemical reactions of PVC. The FTIR analysis confirms that the coating can slow down the microstructures development of the PVC sheets, also indicating that the coating impeded the photochemical reactions of PVC.

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Photodegradation of PVC stabilized by organotin compounds

Cited by 28 publications

References 26 publications

Principles of Thermal Degradation

Principles of Thermal Degradation

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

A novel route for preparation of PVC sheets with high UV irradiation resistance

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