Organic thermal stabilizers for rigid poly(vinyl chloride) V. Benzimidazolylacetonitrile and some of its derivatives

Sabaa, Magdy W.; Mohamed, Nadia A.; Oraby, Emad H.; Yassin, Ahmady A.

doi:10.1016/s0141-3910(02)00009-5

Cited by 23 publications

(16 citation statements)

References 44 publications

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“…The stabilizing action occurs through displacement of the labile chlorine atoms on the polymer chains by the ester from the decomposed stabilizer. Recently, it was reported that the incorporation of organic materials like N‐phenyl maleimides as a stabilizers for PVC or CPVC [9, 10]. Organic stabilizers have the advantage of being metal free and environmentally acceptable.…”

Section: Introductionmentioning

confidence: 99%

Dielectric analysis of α‐relaxation process of chlorinated poly(vinyl chloride) stabilized with nitro‐phenyl maleimide

Hanafy

Mahrous

2012

Polymer Engineering & Sci

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Nitro‐phenyl maleimide (NPM), is the organic stabilizer for poly (vinyl chloride) (PVC), has been investigated as thermal plasticization for rigid chlorinated poly (vinyl chloride) (CPVC). Dielectric relaxation of CPVC stabilized with 10 wt% of NPM has been studied in temperature and frequency ranges of 300–450 K and 10 kHz–1 MHz, respectively. An analysis of the dielectric constant, ε′ and dielectric loss index, ε″, was performed assuming a plasticization effect of NPM molecules. The plasticization effect of NPM molecules was confirmed by the behavior of the dielectric modulus M′ and M″ spectra. A clear dielectric α‐relaxation process has been obtained in the studied temperature range. The results showed that NPM reduce the glass transition temperature, Tg, of CPVC by about 20 K. This effect has been assigned to the plasticization effect of NPM. At lower temperatures, dielectric modulus spectra reveal that there is a role of the effect of the electrode polarization in the relaxation process. The behavior AC conductivity, σac, indicated that the conduction mechanism in all CPVC samples is hopping type conduction. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Dielectric analysis of α‐relaxation process of chlorinated poly(vinyl chloride) stabilized with nitro‐phenyl maleimide

Hanafy

Mahrous

2012

Polymer Engineering & Sci

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“…16 Stabilizers of an organic nature have recently been established for the thermal stabilization of PVC. [17][18][19][20] Blending PVC with another polymer as the second component was also used for the improvement of its heat stability. The second polymers included either addition polymers such as poly(methyl methacrylate), 21 poly(styrene), 22 poly(vinyl butyral), 23 and cis-poly butadiene 24 or step growth polymers like poly(tetra methylene sebacate), 25 poly(dimethylsiloxane), 26 bisphenol-A polycarbonate, 27 and poly(ethylene adipate).…”

Section: Introductionmentioning

confidence: 99%

Thermal degradation behavior of poly(vinyl chloride) in the presence of poly(glycidyl methacrylate)

Sabaa

Farag

Mohamed

2008

J of Applied Polymer Sci

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ABSTRACT:The thermal degradation behavior of poly (vinyl chloride) (PVC) in presence of poly(glycidyl methacrylate) (PGMA) has been studied using continuous potentiometric determination of the evolved HCl gas from the degradation process from one hand and by evaluating the extent of discoloration of the degraded samples from the other. The efficiency of blending PGMA with dibasic lead carbonate (DBLC) conventional thermal stabilizer has also been investigated. A probable radical mechanism for the effect of PGMA on the thermal stabilization of PVC has been suggested based on data reported by FTIR and elemental analyses.

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“…14 Stabilizers of an organic nature have recently been established for the thermal stabilization of PVC. [15][16][17][18] Blending of PVC with another polymer as the second component was also used for the improvement of its heat stability. The second polymers included either addition polymers such as poly (methyl methacrylate), 19 poly(styrene), 20 poly(vinyl butyral), 21 and cis-polybutadiene 22 or step-growth polymers like poly(tetramethylene sebacate), 23 poly (dimethylsiloxane), 24 bisphenol A polycarbonate, 25 and poly(ethylene adipate).…”

Section: Introductionmentioning

confidence: 99%

Thermal degradation behavior of poly(vinyl chloride) in presence of poly(N‐acryloyl‐N′‐cyanoacetohydrazide)

Mohamed

Farag

Sabaa

2008

J of Applied Polymer Sci

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ABSTRACT:The thermal degradation behavior of poly (vinyl chloride), PVC, in presence of poly(N-acryloyl-N 0 -cyanoacetohydrazide), PACAH, has been studied using continuous potentiometric determination of the evolved HCl gas from the degradation process from one hand and by measuring the extent of discoloration of the degraded samples from the other. The efficiency of blending PACAH with dibasic lead carbonate, DBLC, conventional thermal stabilizer has also been investigated. A probable radical mechanism for the effect of PACAH on the thermal stabilization of PVC has been proposed.

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Organic thermal stabilizers for rigid poly(vinyl chloride) V. Benzimidazolylacetonitrile and some of its derivatives

Cited by 23 publications

References 44 publications

Dielectric analysis of α‐relaxation process of chlorinated poly(vinyl chloride) stabilized with nitro‐phenyl maleimide

Dielectric analysis of α‐relaxation process of chlorinated poly(vinyl chloride) stabilized with nitro‐phenyl maleimide

Thermal degradation behavior of poly(vinyl chloride) in the presence of poly(glycidyl methacrylate)

Thermal degradation behavior of poly(vinyl chloride) in presence of poly(N‐acryloyl‐N′‐cyanoacetohydrazide)

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