2012

Cevap Yüzey Yöntemi Kullanılarak Poli(VPi–ko-MA) / Grafen Kompozitlerinin İletkenliğinin Optimizasyonu

Bu çalışmada, öncelikle poli(Vinil pivalat–ko-Maleik anhidrit) [poli(VPi-ko-MA)] kopolimeri serbest radikalikpolimerizasyon yöntemiyle 65 oC’de 24 saat süreyle sentezlenmiştir. FT-IR ile karakterize edilen kopolimerinkütlece farklı miktarlarda Grafen (GF) içeren kompozitleri çözelti döküm tekniği ile hazırlanmıştır. KompozitlerFT-IR ve SEM teknikleri ile karakterize edilmiştir. Uygulanan voltaj, frekans ve GF içeriği arasında kantitatif birilişki elde etmek için cevap yüzey yöntemi (CYY) kullanılmıştır. Ölçülen cevap, kompozitlerin elektriksel (AC)iletkenliğidir. Modeldeki parametrelerin (frekans, voltaj ve GF miktarı) önemi, varyans analizi ile belirlenmiştir(ANOVA). Model, maksimum elektriksel iletkenliği, 1619 Hz frekansta, voltaj 15.56 V'da ve GF miktarı ağırlıkça% 9.99 için 6.93×10-8 S cm-1 olarak öngörmüştür.

Optimization of Conductivity of Poly (VPi-co-MA) / Graphene Composites by Using Response Surface Method

In this study, firstly Poly(Vinyl pivalate-co-Maleic anhydride) [poly(VPi-co-MA)] copolymer was synthesized by Free radical polymerization method at 65 oC for 24 hours. The composites of the copolymer characterized by FTIR containing different amounts of Graphene (GF) were prepared by solution casting technique. Composites were characterized by FT-IR and SEM techniques. Response surface method (RSM) was used to obtain a quantitative relationship between applied voltage, frequency and GF content. The measured response is the electrical conductivity of the composites. The importance of parameters (frequency, voltage, and GF amount) in the model was determined by variance analysis (ANOVA). The model predicted maximum electrical conductivity as 6.93×10-8 S cm-1 for frequency at 1619 Hz, voltage at 15.56 V, and GF amount 9.99%.

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