Influence of small amounts of polyvinylchloride on the recycling of polyethyleneterephthalate

Paci, Massimo; Mantia, F. P. La

doi:10.1016/s0141-3910(98)00053-6

Cited by 65 publications

(49 citation statements)

References 5 publications

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“…The first class of contaminants is acids and acid-producing contaminants, for example, PVC, which produces hydrochloric acid [38,58]. Acids act as catalysts for chain cleavage reactions [59,60].…”

Section: Recyclingmentioning

confidence: 99%

Plastic Degradation and Its Environmental Implications with Special Reference to Poly(ethylene terephthalate)

et al. 2012

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Abstract:With increasing global consumption and their natural resistance to degradation, plastic materials and their accumulation in the environment is of increasing concern. This review aims to present a general overview of the current state of knowledge in areas that relate to biodegradation of polymers, especially poly(ethylene terephthalate) (PET). This includes an outline of the problems associated with plastic pollution in the marine environment, a description of the properties, commercial manufacturing and degradability of PET, an overview of the potential for biodegradation of conventional polymers and biodegradable polymers already in production.

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Section: Recyclingmentioning

confidence: 99%

Plastic Degradation and Its Environmental Implications with Special Reference to Poly(ethylene terephthalate)

et al. 2012

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“…Thus, thermal degradation of PET occurs. As a consequence, reduced thermal and mechanical properties of the re-processed material were the main findings of these investigations (downcycling) [66][67][68][69][70][71][72][73][74][75][76][77][78]. Hence, a repeated thermal re-processing of PETwaste finally leads to a downcycling of the material.…”

Section: Thermo-mechanical Recycling 231 Re-melting Without Additivesmentioning

confidence: 94%

Recycling of poly(ethylene terephthalate) – A review focusing on chemical methods

Geyer¹,

Lorenz²,

Kandelbauer³

2016

Express Polym. Lett.

204

120

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Abstract.Recycling of poly(ethylene terephthalate) (PET) is of crucial importance, since worldwide amounts of PETwaste increase rapidly due to its widespread applications. Hence, several methods have been developed, like energetic, material, thermo-mechanical and chemical recycling of PET. Most frequently, PET-waste is incinerated for energy recovery, used as additive in concrete composites or glycolysed to yield mixtures of monomers and undefined oligomers. While energetic and thermo-mechanical recycling entail downcycling of the material, chemical recycling requires considerable amounts of chemicals and demanding processing steps entailing toxic and ecological issues. This review provides a thorough survey of PET-recycling including energetic, material, thermo-mechanical and chemical methods. It focuses on chemical methods describing important reaction parameters and yields of obtained reaction products. While most methods yield monomers, only a few yield undefined low molecular weight oligomers for impaired applications (dispersants or plasticizers). Further, the present work presents an alternative chemical recycling method of PET in comparison to existing chemical methods.

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“…Geri kazanılan PET'in içerisindeki PVC'nin varlığı, PVC'nin bozulması esnasında mikro moleküller sayesinde gelişen hidroklorik asidin zincir bölünmesi nedeniyle çok tehlikelidir. PVC'nin ortama saldığı bu hidroklorik asidin çevreye olan zararları yüksektir [3,4].…”

Section: Gġrġġunclassified

PVC ve PET Atıkların Seçimli Flotasyonu Bölüm 1: Plastikler, Çevresel Etkileri, Geri Dönüşümü

Yüce

Kılıç²

2014

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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Plastiklerin doğada uzun süre kalarak çevre kirliliğindeki ciddi tehlikelerden biri olması ve dünya plastik tüketiminin giderek artması, bu maddelerin geri dönüşümünü gündeme getirmiştir. Geri kazanımı üzerinde durulan en önemli iki plastik türü Polietilen Teraftalat (PET) ve Polivinil Klorür (PVC)'dür. PVC'lerde bulunan katkı maddelerinin çevreye zehirli gazlar ve hidroklorik asit karıştırma riskinden dolayı, bu zararları önlemek adına PET ve diğer plastiklerden ayrılması için çalışmalar yapılmaktadır. Plastiklerin yoğunlukları birbirine yakın olduğundan dolayı, gravite yöntemleri ile ayrılması söz konusu değildir, fakat yüzey özelliklerinden yararlanılarak PET ve PVC'den biri hidrofilik yapılıp bastırılırken diğerinin yüzdürülerek köpükle alınması mümkündür. Doğal hidrofobik olan plastiklerden hidrofilik olması istenen plastiğin yüzeyi değiştirilmesi gerekir ve bu sebeple plastikleştirici reaktifler kullanılır. İki bölümden oluşan bildirinin birinci bölümünde plastikler, çevresel etkileri ve geri dönüşüm prosesleri hakkında genel bilgiler verilmiştir.

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Influence of small amounts of polyvinylchloride on the recycling of polyethyleneterephthalate

Cited by 65 publications

References 5 publications

Plastic Degradation and Its Environmental Implications with Special Reference to Poly(ethylene terephthalate)

Plastic Degradation and Its Environmental Implications with Special Reference to Poly(ethylene terephthalate)

Recycling of poly(ethylene terephthalate) – A review focusing on chemical methods

PVC ve PET Atıkların Seçimli Flotasyonu Bölüm 1: Plastikler, Çevresel Etkileri, Geri Dönüşümü

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