Ired amount of OG-POSS (0, 5, and 10 wt ) was dissolved in minimum amount

Ired amount of OG-POSS (0, 5, and 10 wt ) was dissolved in minimum amount of 1,4-dioxane. The homogeneous mixture was subjected to sonic waves in a sonicator for effective collision and distribution at 25 C for 1 h. The blends were cast on a glass plate and pre-treated with dichlorodimethylsilane. After drying at 60 C for 5 h, the blended samples were cured at 100, 150, 200 for 1 h each and 250 C for 2 h in an air oven. The red brown colored POSS reinforced CE (POSS-AECE) nanocomposites were obtained with thicknesses ranging from 0.3 to 0.5 mm (Scheme 2).CHARACTERIZATIONFT-IR spectra were recorded on a Perkin Elmer 6FT-IR spectrometer. About 100 mg of optical-grade KBr was ground with sufficient quantity of the solid sample to make 1 wt mixture for making KBr pellets. All 1 H and 13 C NMR analyses were done in CDCl3 and recorded on a Bruker 300 and Bruker 500 spectrometer. The calorimetric analysis was performed on a Netzsch DSC200 differential scanning calorimeter. Measurements were performed under a continuous flow of nitrogen (20 mL/min). All the samples (about 10 mg in weight) were heated from ambient temperature to 300 C and the thermograms were recorded at a heating rate of 10 C/min. Thermo gravimetric analysis (TGA) was performed on a Netzsch STA 409 thermo gravimetric analyzer. The samples (about 10 mg) were heated from ambient temperature to 700 C under a continuous flow of nitrogen (20 mL/min), at 10 C/min. The dielectric constant of the neat AECE and the POSS-AECE systems were determined with the help of impedance analyser (Solartron impedance/gain phase analyser 1260) at room temperature using platinum (Pt) electrode at a frequency range of 1 MHz.Paroxetine This experiment was repeated four times at the same conditions.Frontiers in Chemistry | Polymer ChemistryOctober 2013 | Volume 1 | Article 19 |Devaraju et al.Low surface free energy CE/POSSOOCH3 SiNCO OnOOCN+O OO OLinear aliphatic ether linkaged cyanate ester (AECE1-4)O O N N O N O O N O N N O O O O N O N O N O O O O O O CH3 Si H3C O Si O OH3CH C O 3 Si Si O SiO OO H3C CH3 O Si O Si O Si O H3H C O C 3 Si CH3 OO O CH3 CH3 O O Si O O Si O H C CH3 O 3 O O Si O Si O H3C Si O O CH3 O Si H3C O O O SiH3CSiOG-POSSN N O N N O O N O O N O O O O N OThermal cureOnnOnO N O N N OOOnN O OO CH3 CH3 H3CH C O O O 3 Si O Si O O N Si O Si OO Si O CH3 O H3C H3C CH3 O O Si O Si O Si O O Si O H3C Si O O Si O H3C O CH3 H3C O O N Si CH3 H3C Si O O O O N O O nSinOO O O n O N O N N NN N O OOO N O N N OnOOSi Si Si Si Si Si Si Si Si Si SiSiSi Si Si Si Si Si Si Si Sin = 2, 4, 6Si Si Si SiSi Si Si Si Si Si Si Si Si Si Si Si Si Si Si Si Si SiSi Si Si Si Si Si SiSiSiSi Si Si SiScheme 2 | Schematic representation of POSS-AECE nanocomposites.Olitigaltin (5 and 10 wt ) in to AECE resin.PMID:24761411 Figure 3 shows the FTIR spectra of varying combinations of POSS-AECE nanocomposites. The disappearance of the bands at 2237 cm-1 (the CN group of the CE) and 914 cm-1 (the glycidyl group of OG-POSS), and the appearance of a band at 1635 cm-1 corresponding to an oxazoline linkage, confirms the occurrence of a reaction between the OCN group of CE and glycidyl group of OG-POSS. The symmetric and asymmetric stretching frequencies of the -CH2 group appeared at 2924 and 2868 cm-1 , respectively. The presence of aband at 1098 cm-1 due to Si-O-Si confirms the presence of a silica network in the hybrid. The glass transition temperature (Netzsch DSC-200) of the neat AECEs and POSS ECE nanocomposites are shown in Table 2. The POSS-AECE nanocomposites ex.