Reactivity of polyesters in glycolysis reactions: Unexpected effect of the chemical structure of the polyester glycolic unit

Pardal, Francis; Tersac, Gilles

doi:10.1016/j.polymdegradstab.2006.05.015

Cited by 10 publications

(6 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Pardal and Tersac [45] explained that during the reaction of glycolysis without the catalyst, despite the dissolution of polyester, DPG had a lower chemical reactivity compared to EG and diethyleneglycol (DEG). It was also shown that low solvation capability of glycerol contributed to low reactivity in contrast to DEG and DPG [45].…”

Section: Depolymerization Section-glycolysis Of Petmentioning

confidence: 99%

“…It was also shown that low solvation capability of glycerol contributed to low reactivity in contrast to DEG and DPG [45]. Considering the stereochemical aspect of reacting species involved in creating the activated complex, a significant influence of the steric effect of the DPG methyl group on the reaction rate was expected.…”

Section: Depolymerization Section-glycolysis Of Petmentioning

confidence: 99%

See 1 more Smart Citation

Effect of the modified silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate

et al. 2015

View full text Add to dashboard Cite

Unsaturated polyester resin (UPe)-based nanocomposites and fumed silica Aerosil R812S, R805 and R816, and R200 modified with phenyl terminal group, R200NPh, were prepared. UPe resins were synthesized from maleic anhydride and products of glycolysis, obtained by polyethylene terephthalate depolymerization with dipropylene glycol in the presence of tetrabutyl titanate catalyst. The obtained unsaturated polyesters were characterized by acid, hydroxyl, and iodine values and by FTIR and NMR analysis. The microstructural analysis of the prepared nanocomposites, performed by using transmission electron microscopy, confirmed that silica nanoparticles formed chain-like aggregates in the polymer matrix. The presence of modified silica nanoparticles had no influence on the glass transition temperature and thermal stability of polyester matrix.

show abstract

Section: Depolymerization Section-glycolysis Of Petmentioning

confidence: 99%

Section: Depolymerization Section-glycolysis Of Petmentioning

confidence: 99%

Effect of the modified silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The purpose of chemical recycling is to recover and reuse monomers [14]. This method is used for polyamides as well as polyurethanes [14][15][16] and polyesters [17,18]. The reactivity of polyamides depends on the polar amide groups present in the main polyamide chain, which can react with decomposing agents.…”

Section: Introductionmentioning

confidence: 99%

A New Approach to Chemical Recycling of Polyamide 6.6 and Synthesis of Polyurethanes with Recovered Intermediates

et al. 2018

View full text Add to dashboard Cite

A new efficient method for the chemical decomposition of polyamide 6.6 by the glycolysis and amino-glycolysis processes was proposed. The glycolysis was conducted using the mass excess of ethylene glycol (EG) as a decomposing agent in the presence of a catalyst. Also, a mixture of EG and triethylenetetramine was used as another decomposing agent in the aminoglycolysis process. The described process of decomposition did not require the use of elevated pressure. The hydroxyl and amine numbers, rheology behavior and the presence of characteristic chemical groups in the obtained glycolysates and aminoglycolysates were determined in order to characterize the reaction products. The decomposition products were defined as non-Newtonian fluids that could be described by suitable mathematical models. The conducted studies showed that the properties of the obtained intermediates depend on the mass excess of the decomposing agent used. The resulting semiproducts are suitable for reusing in the synthesis of polyurethanes, which has been confirmed by the exemplary synthesis. In the reaction, 10 and 15 wt% of commercial polyol were replaced with the recovered intermediates.

show abstract

“…Glikoliz reaksiyonu kimyasal geri dönüşüm yöntemlerinin en çok kullanılanlarının başında yer almaktadır ve üretilen polyesterlerde kullanılan glikol grubuna göre de çeşitlilik göstermektedir [13][14][15]. Glikoliz işlemi sırasında di etilen glikol, propilen glikol, neopentil glikol gibi farklı glikoller kullanılabilir [13,16].…”

Section: Gi̇ri̇ş (Introduction)unclassified

“…Katalizör olarak çeşitli metal tuzları [12,19] kullanılabilmektedir. Katalizörsüz ortamda ise reaksiyon süresinin uzun olduğu belirtilmektedir [13,14,20,21].…”

Section: Gi̇ri̇ş (Introduction)unclassified

Atık Balyalama İplerinden Poliüretan Üretimi

Bilici

2017

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

View full text Add to dashboard Cite

Günümüzde üretim yöntemleri kadar üretilen maddelerin atıklarından oluşan kirliliklerin giderilme yöntemleri de önemli konuların başında gelmektedir. Bu atıkların bertaraf edilmesinin yanı sıra mevcut kaynakların da ekonomik ve ekolojik olarak daha verimli kullanılmasını gerektirmektedir. Dünyada tüketilen en önemli plastik maddelerden biri olan polyester esaslı polimerler için birçok geri kazanım yöntemi bulunmaktadır. Bunlar temel olarak fiziksel ve kimyasal geri kazanım yöntemleridir. Kimyasal geri kazanım yöntemleri de glikoliz, aminoliz, metanoliz, hidroliz gibi yöntemlerden oluşmaktadır. Bu çalışmada balya iplerinden oluşan atıklar glikoliz yöntemi ile geri dönüşüme tabi tutularak aromatik polyester poliol elde edilmiştir. Glikoliz reaksiyonu için çinko asetat katalizörlüğünde di etilen glikol kullanılmış olup, glikol oranı deneysel parametre olarak incelenmiştir. Glikoliz sonucu oluşan poliol, asit sayısı, hidroksil sayısı ve FTIR ile karakterize edilmiştir. Geri dönüşümden elde edilen bu poliol ile TDI'ın (tolüen di izosiyanat) reaksiyonu sonucunda ise poliüretan malzeme elde edilmiştir. Elde edilen poliüretan malzeme FTIR ve TGA ile incelenmiş ve ticari poliüretan ile karşılaştırılmıştır. Sonuç olarak polyester bazlı atık balya iplerinin glikoliz ile geri dönüşüm için elverişli ve uygulanabilir yöntem olduğu görülmüştür.

show abstract

Reactivity of polyesters in glycolysis reactions: Unexpected effect of the chemical structure of the polyester glycolic unit

Cited by 10 publications

References 9 publications

Effect of the modified silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate

Effect of the modified silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate

A New Approach to Chemical Recycling of Polyamide 6.6 and Synthesis of Polyurethanes with Recovered Intermediates

Atık Balyalama İplerinden Poliüretan Üretimi

Contact Info

Product

Resources

About