Polibenzoksazol türü polimerlerle modifikasyonun epoksi reçine özelliklerine etkisi
Yükleniyor...
Dosyalar
Tarih
2015-04-30
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Selçuk Üniversitesi Fen Bilimleri Enstitüsü
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Bu çalışmada, farklı kimyasal yapıya sahip polibenzoksazol türü polimerler (poli[2,2'-(p,p'-difenileter)-5,5'-bis(benzoksazol) - EOK ve poli[2,2'-(p-fenilen)-5,5'-bis(benzoksazol) – TFAOK) sentezlenerek ticari epoksi reçinede ilk kez modifikatör olarak kullanıldı. Polimerlerin kimyasal yapıları FTIR ile aydınlatıldı. Sentezlenen polimerler farklı kütle oranlarında (% 2,5, % 5 ve % 7,5) epoksi reçineye katılarak mekanik, termal, su sorpsiyonu ve elektriksel iletkenlik özelliklerine etkisi incelendi. Modifiye epoksi numunelerin morfolojisi SEM ve XRD ile karakterize edildi. Tüm numunelerin çekme direnci ve sertliği saf epoksiye göre çok daha yüksek bulundu. Genelde tüm numunelerde modifikatör oranı arttıkça % uzamanın azaldığıı, en fazla % uzamanın ise (% 0,721 olarak) TFAOK’la modifiye epoksi ile tespit edildi. TGA analizi, modifikasyonun termal dayanıklılığı fazla etkilemediği gösterdi. Su sorpsiyonunda ise en iyi sonuç yine TFAOK’la modifiye epoksi ile elde edildi. Modifiye epoksi numunelerin yarıiletken özellik sergilediği belirlendi.
In this study, the new polybenzoxazol type polymers which have different chemical structure (poly[2,2'-(p,p'-diphenylether)-5,5'-bis(benzoxazol)-EOK ve poly[2,2'-(p-phenylene)-5,5'-bis(benzoxazol) – TFAOK) were synthesized and was first used as a modifier in commercial epoxy resin. The chemical structures of synthesized polymers were clarified by FTIR method. Effects on mechanical, thermal, water sorption and electrical conductivity properties of epoxy resin were examined by adding synthesized polymers to epoxy resin in different mass ratios (2.5 %, 5 % and 7.5 %) The morphology of modified epoxy specimens were characterized by SEM and XRD. Tensile strength and hardness of all samples were found higher compared to pure epoxy. It was detected that % elongation was decreasing while modificator amount was increasing and the maximum elongation percentage (as % 0.721) was found with the TFAOK modified epoxy. TGA analysis indicated that modification with polymers did not affect thermal resistance so much. It was determined that modified epoxy samples exhibits semiconductor properties. Also, in water sorption the best result was obtained with TFAOK modified epoxy.
In this study, the new polybenzoxazol type polymers which have different chemical structure (poly[2,2'-(p,p'-diphenylether)-5,5'-bis(benzoxazol)-EOK ve poly[2,2'-(p-phenylene)-5,5'-bis(benzoxazol) – TFAOK) were synthesized and was first used as a modifier in commercial epoxy resin. The chemical structures of synthesized polymers were clarified by FTIR method. Effects on mechanical, thermal, water sorption and electrical conductivity properties of epoxy resin were examined by adding synthesized polymers to epoxy resin in different mass ratios (2.5 %, 5 % and 7.5 %) The morphology of modified epoxy specimens were characterized by SEM and XRD. Tensile strength and hardness of all samples were found higher compared to pure epoxy. It was detected that % elongation was decreasing while modificator amount was increasing and the maximum elongation percentage (as % 0.721) was found with the TFAOK modified epoxy. TGA analysis indicated that modification with polymers did not affect thermal resistance so much. It was determined that modified epoxy samples exhibits semiconductor properties. Also, in water sorption the best result was obtained with TFAOK modified epoxy.
Açıklama
Anahtar Kelimeler
Epoksi reçine, Modifikasyon, Epoxy resin, Modification
Kaynak
WoS Q Değeri
Scopus Q Değeri
Cilt
Sayı
Künye
Özer, L. (2015). Polibenzoksazol türü polimerlerle modifikasyonun epoksi reçine özelliklerine etkisi. Selçuk Üniversitesi, Yayımlanmış yüksek lisans tezi, Konya.
