Synthesis of poly[ε-caprolacton-b-epichlorohydryin-b-ε-caprolactone]- g-poly(styrene) Block-Graft Copolymers via Cationic Ring Opening and Atom Transfer Radical Polymerization Transformations

Year 2017, Volume: 7 Issue: 3, 161 - 169, 30.09.2017

ÜMİT Yıldıko İsmail Çakmak Temel Öztürk Abdulkadir Yörük

Abstract

The poly[(ε-caprolacton-b-epichlorohydrin-b-ε-caprolactone)]-g-(polystyrene-) [(PCL-b-ECH-bPCL)]-g-PS block-graft copolymers were prepared via cationic, ring opening (ROP) and atom transfer radical
polymerization (ATRP) transformations. With this goal in the frst, cationic ring-opening technique was used to
polymerize the epichlorohydrin (ECH). The ring opening polymerisation (ROP) of ε-caprolactone (ε-CL) was
carried out using poly (epichlorohydrin) (PECH) with hydroxyl functional groups acting as initiators at 110 ºC to
yield poly(ε-caprolacton-b-epichlorohydrin-b-ε-caprolactone) (PCL-PECH-PCL) block copolymer. Finally, in the
atom transfer radical polymerisation (ATRP) of the styrene, chloromethyl groups of the PECH segment of PCLPECH-PCL were used as the starting functional group. [PCL-b-PECH-b-CL] -g-PS graft copolymer block was
obtained as a result of polymerization. The results of the analysis indicated that the molecular weights of the graft
copolymers increased linearly with styrene polymerisation. Synthesized polymers were characterized by 1 H-NMR,
GPC and DSC techniques.

Keywords

ATRP, ROP, block copolymer, block-graft copolymer, epichlorohydrin, ε-caprolacton.

Poli - [(ε-kaprolakton-b-epiklorohidrin-b-ε-kaprolakton)] - g- (polistiren-) [(PCL-b-ECH-b-PCL)] - g-PS Blok-aşı Kopolimerleri Katyonik, Halka Açıklma Polimerizasyonu (ROP) ve Atom Transfer Radikal Polimerizasyon (ATRP) Tekniklerinin Kombinasyonu ile Sentezi

Abstract

Poli - [(ε-kaprolakton-b-epiklorohidrin-b-ε-kaprolakton)] - g- (polistiren -) [(PCL-b-ECH-b-PCL)] - g-PS
blok-aşı kopolimerleri katyonik, halka açıklama polimerizasyonu (ROP) ve atom transfer radikal polimerizasyon
(ATRP) tekniklerinin kombinasyonu ile sentezlenmiştir. Bu amaçla, epiklorohidrin (ECH) polimerize etmek
için katyonik halka açma tekniği kullanılmıştır. Sentezlenen, Hidroksil fonksiyonel gruplu poli (epiklorohidrin)
(PECH), ε-kaprolaktonun (ε-CL) 110 ° C’de halkalı açılma polimerizasyonunun (ROP) başlatıcısı olarak poli
(ε-kaprolakton-b-epiklorohidrin- B-ε-kaprolakton) (PCL-PECH-PCL) blok kopolimerinin eldesinde kullanıldı.
Son olarak, başlatıcı olarak PCL-PECH-PCL’nin PECH bloğunun klorometil gruplarını kullanarak gerçekleştirilen
stirenin atom transfer radikal polimerizasyonu (ATRP), [PCL-b-PECH-b-CL] -g-PS-graft kopolimeri oluşumuyla
sonuçlanmıştır. Elde edilen sonuçlar, graft kopolimerlerinin moleküler ağırlıklarının stiren dönüşümüyle arttığını
gösterdi. Polimerler, 1H-NMR, GPC ve DSC teknikleri ile karakterize edildi.

Keywords

ATRP, ROP, blok kopolimer, blok-aşı kopolimer, epiklorohidrin, ε-kaprolakton.

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