Structure of chlorinated poly(vinyl chloride). I. Determination of the mechanism of chlorination from infrared and NMR spectra

Kolínský, M.; Doskočilová, D.; Scheider, B.; Štokr, J.; Drahorádová, E.; Kuška, Vladimíar

doi:10.1002/pol.1971.150090317

Cited by 26 publications

(5 citation statements)

References 14 publications

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“…above are based on the assumption that not more than one chlorine atom can enter one monomeric unit. Kolinsky et al found that the deuterium content in chlorinated PVC remains constant despite the increase in chlorine content during chlorination of a-deuterated PVC (54). Their results are shown in Fig.…”

Section: H2supporting

confidence: 56%

Chemical modification of PVC

Suzuki¹

1977

Pure and Applied Chemistry

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The degradation of PVC at a processing temperature is mostly caused by its abnormal and unstable molecular structures. It .has been pointed out that its allyl chloride structures play a significant role as the abnormal and unstable structures. Inasmuch as the allyl chloride structures are markedly more chemically active than the normal structure, the selective chemical treatments are applicable to the allyl chloride structures. The thermal stability of .PVC can be remarkably improved by treating PVC with certain organo-aluminium compounds or protic solvente. Concretely, the results of analyzing the reaction mechanism with the low molecular model compounds of PVC or .the tracer show that the selective stabilizing reaction on the allyl chloride structure takes place. On the other hand, the improvement of the. mechanical properties of PVC, such as softening temperature, rigidity, anti-creep property, impact strength and tensile strength, is important for practical applications of PVC.

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Section: H2supporting

confidence: 56%

Chemical modification of PVC

Suzuki¹

1977

Pure and Applied Chemistry

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“…Chlorinated poly(vinyl chloride) (CPVC), a valuable engineering thermoplastic, is widely used in a variety of processes and industries because of its high glass transition temperature and heat distortion temperature, prominent chemical inertness, and mechanical, dielectric, flame‐retardant, and smoke‐suppressing properties [1, 2]. However, it is now well‐recognized that CPVC cannot be processed without the addition of stabilizers and lubricants because of its poor thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Chlorinated poly(vinyl chloride) stabilization by pentaerythritol/calcium‐zinc stearate mixtures: The fate of pentaerythritol

Liao

Chen

2011

Vinyl Additive Technology

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The stabilization effect of pentaerythritol (Pe) combined with calcium and zinc stearates (CaSt2/ZnSt2) on chlorinated poly(vinyl chloride) (CPVC) is investigated. Congo red and dynamic thermal stability data indicate that Pe alone has a mild stabilizing effect on the degradation of CPVC. Addition of mixed CaSt2/ZnSt2 to this system leads to a significant improvement in stability. Thermogravimetric studies indicate that premature weight loss, not observed with either Pe alone or with CaSt2/ZnSt2, is observed when the combined Pe/CaSt2/ZnSt2 systems are employed to stabilize CPVC. Fourier transform infrared (FTIR) spectroscopy and electrospray ionization mass spectrometry (ESIMS) both indicate that condensation (oligomerization) and chlorination of Pe occur when Pe and Pe/CaSt2/ZnSt2 systems are employed to stabilize CPVC. J. VINYL ADDIT. TECHNOL., 2011. © 2011 Society of Plastics Engineers

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“…5 Previous studies have shown that the chlorine radical substitutes preferentially for the hydrogen atom of the -CH 2 -groups in the PVC repeat unit. 8,10,13,[15][16][17][18] Thus, the chain reaction proceeds as…”

Section: The Diffusion-reaction Mechanismmentioning

confidence: 99%