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Ganjali, Mohammad Reza,Babaei, Leila Hajiagha,Taghvaei-Ganjali, Saeed,Modjallal, Atoosa,Sahmsipur, Mojtaba,Hosseini, Morteza,Javanbakht, Mehran Korean Chemical Society 2004 Bulletin of the Korean Chemical Society Vol.25 No.2
A PVC membrane electrode for silver ion based on a new cone shaped calix[4]arene (CASCA) as membrane carrier was prepared. The electrode exhibits a Nernstian response for $Ag^+$ over a wide concentration range ($1.0{\times}10^{-1}-8.0{\times}10^{-6}$M) with a slope of 58.2 {\pm}$ 0.5 mV per decade. The limit of detection of the sensor is $5.0{\times}10^{-6}$M. The sensor has a very fast response time (~5 s) in the concentration range of ${\leq}=1.0{\times}10^{-3}$ M, and a useful working pH range of 4.0-9.5. The proposed sensor displays excellent discriminating ability toward $Ag^+$ ion with respect to common alkali, alkaline earth, transition and heavy metal ions. It was used as an indicator electrode in potentiometric titration of $Ag^+$ with EDTA and in direct determination of silver ion in wastewater of silver electroplating.
NR-BR 기반 고무소재에서 폴리부타디엔의 C-C겔 함량과 물리기계적, 유변학적 특성 사이의 상호관계
Saeed Taghvaei Ganjali,Fereshteh Motiee,Zohreh Ghazi Tabatabaie 한국고분자학회 2014 폴리머 Vol.38 No.4
In this study, microstructure and gel content (C-C) of polybutadiene rubber (PBR) were investigated using var-ious techniques includng ASTM D3616, attenuated total reflectance Fourier transform infrared spectrometry (ATR FTIR), differential scanning calorimetry (DSC) and nuclear magnetic resonance spectroscopy(NMR). The ATR FTIR spectra of the samples were investigated to determine the cis, trans, 1,2-vinyl and the C-C gel content in PBR. The absor-bance ratios of specific peaks in different grades of PBR were correlated with the C-C gel content measured by the ATR FTIR techniques. Physico-mechanical and rheological properties of rubber compounds based on BR with various amounts of gel were determined. The results showed that there is an accptable correlation between these properties and the C-C gel content of PBR.