Six-Center Concerted Mechanism for Poly(vinyl chloride) Dehydrochlorination. <i>Requiescat in Pace</i>?  Volume 29, Number 23, November 4, 1996, pp 7631−7633

Starnes, W. H.; Wallach, Joshua A.; Yao, Hongyang

doi:10.1021/ma9520252

Cited by 2 publications

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“…These defects are mainly, allylic or tertiary labile chlorine atoms, which cause the formation of polyenes after losing HCl [5].…”

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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“…These defects are mainly, allylic or tertiary labile chlorine atoms, which cause the formation of polyenes after losing HCl [5].…”

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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“…Aiming at the improvement of this thermal stability, many classes of thermal stabilizers are known, including soap stabilizers (Vymazal et al, 1983;Naqui et al, 1984), organo tin stabilizers and fully organic stabilizers (Banzato et al, 2010;Mohamed and Al-Magribi, 2003;Yassin et al, 1991). Different methods of using these stabilizers are either addition (Sabaa et al, 2005;2006;Abdel-Naby and Al Dossary, 2008a;Abdel-Naby et al, 2010) to the polymer or chemical modification of the polymer to displace the labile sites by more stable stabilizer moieties (Starnes et al, 1997;Abdel-Naby and Youssef, 1998;Abdel-Naby, 1999) Grafting copolymerization (Abdel-Naby 2001;Abdel-Naby and Al Dossary, 2008b) or blending with other polymer (Abdel-Naby and Al Dossary, 2009;Abdel-Naby and El-Hefnawy, 2003) are the most used methods. These last two methods possess the advantage that the stabilizing moieties are polymeric in nature which helps the compatibility between the polymer and the stabilizer moieties as well as the improvement of the mechanical properties (Mohamed and Sabaa, 1999).…”

Section: Introductionmentioning

confidence: 99%

Improvement of the Thermal, Photo and Mechanical Properties of Poly (Vinyl Chloride) in Presence of Poly (Glycidyl Methacrylate)

Abdel‐Naby¹

2011

American Journal of Applied Sciences

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Problem statement: Poly (vinyl chloride) suffers from poor heat stability. The thermal degradation of the polymer leads to the evolution of hydrogen chloride gas, extensive discoloration of the polymer and lowering of physical and mechanical properties. Approach: Binary blends of Poly (Vinyl Chloride) (PVC) and Poly (Glycidyl Methacrylate) (PGMA) have been prepared by solution blending aimed at the improvement of thermal and mechanical properties. Results and Conclusion: Thermal properties of the blends were studied using Scanning Calorimetry (DSC), Thermogravimetry (TGA) and potentiometric rate of dehydrochlorination. The increase of the PGMA content in the blend leads to thermal stability of the blend as shown from the thermogravimetry and the rate of dehydrochlorination results. All blends exhibited one major glass transition temperature (Tg) whose position on the temperature scale was lowered with increased level of PGMA. The miscibility of blends was also confirmed by the use of Scanning Electron Microscope (SEM). The improvement of the mechanical properties of various blends of the two polymers was also obtained

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Six-Center Concerted Mechanism for Poly(vinyl chloride) Dehydrochlorination. Requiescat in Pace? Volume 29, Number 23, November 4, 1996, pp 7631−7633

Cited by 2 publications

References 0 publications

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

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

Improvement of the Thermal, Photo and Mechanical Properties of Poly (Vinyl Chloride) in Presence of Poly (Glycidyl Methacrylate)

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