Nilgün ASAN, TEMEL ÖZTÜRK, Hasibe KUDU, Ergül MEYVACI, Efkan ÇATIKER

Çeşitli Uzunluklardaki PEG’ler Vasıtasıyla PVC’nin “Klik” Kimyası ile Çapraz Bağlanması

Çapraz bağlı poli(vinil klorür) (c-PVC), azit grup ekli poli(vinil klorür) (PVC-N3) ile dipropargillenmiş polietilen glikolün (dp-PEG) “klik” kimyası reaksiyonuyla sentezlendi. Bu amaç için, dp-PEG’ler, farklı molekül ağırlıklarına sahip polietilen glikollerin (400 Da, 600 Da, 1000 Da, 1500 Da, 2000 Da, 3000 Da, and 10000 Da) propargil klorür ile muamelesinden elde edildiler. PVC-N3, PVC zincirleri üzerindeki asılı klorürlerle azid iyonu arasındaki yer değiştirme reaksiyonuyla sentezlendi. PVC-N3 ve çeşitli uzunluklardaki dp-PEG’ler kullanılarak farklı derecelerde çapraz bağlamaya sahip c-PVC’ler elde edildi. PVC-N3, dp-PEG ve c-PVC’nin karakterizasyonları, Fourier dönüşümlü kızılötesi spektroskopisi, nükleer manyetik rezonans spektroskopisi, termogravimetrik analiz, taramalı elektron mikroskobu ve elementel analiz teknikleri kullanılarak gerçekleştirildi. N,N-dimetilformamid içinde farklı çapraz bağlanma yoğunluklarına sahip c-PVC’lerin şişme dereceleri nicel ölçümlerle belirlendi.

Anahtar Kelimeler:

"Klik" kimyası, çapraz bağlanma, poli(vinil klorür), polietilen glikol, şişme derecesi

Cross-linking of PVC by Various Lengths of PEG via “Click” Chemistry

Cross-linked poly(polyvinyl chloride) (c-PVC) was synthesized by “click” reaction of polyvinyl chloride with azido pendant group (PVC-N3) and dipropargyllated polyethylene glycol (dp-PEG). For this purpose, dp-PEGs were obtained from polyethylene glycols with different molecular weights (400 Da, 600 Da, 1000 Da, 1500 Da, 2000 Da, 3000 Da, and 10000 Da) via treatment with propargyl chloride. PVC-N3 was synthesized through the substitution reaction between the pendant chloride on the PVC chains and azide ion. By using PVC-N3 and dp-PEGs with various lengths, c-PVCs with various degrees of cross-linking was obtained. The characterization of the PVC-N3, dp-PEG and c-PVC were performed using Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, thermogravimetric analysis, scanning electron microscopy and elemental analysis. Degrees of swelling of c-PVCs with different cross-linking densities in N,N-dimethylformamide were determined by quantitative measurements

Keywords:

"Click" chemistry, cross-linking, poly(vinyl chloride), polyethylene glycol, degree of swelling,

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