This research studies the influence of using SiO2 nano-particles 50nm in a Vapor Compression Refrigeration System (VCRS), along with Poly-alkylene Glycol (PAG) oil and R-134a mixed to create nano-refrigerant. The methodology used this work, were performed three different concentrations (0.1%, 0.3%, 0.5%) 200ml PAG oil. A VCR system was built at mechanical engineering department laboratory Al-Qa...

In the present study, a series of aliphatic polyesters based on succinic acid and several diols with 2, 4, 6, 8, 10 methylene groups, namely poly(ethylene succinate) (PESu), poly(butylene (PBSu), poly(hexylene (PHSu), poly(octylene (POSu), poly(decylene (PDeSu), were prepared via two-stage melt polycondensation method. All semicrystalline materials Tm ranging from 64.2 to 117.8 °C, while their ...

Twelve novel Re(I) acetonitrile complexes of the type [Re(CO)3(L)(MeCN)][WCA], with L being a chelating bis(NHC) ligand with alkylene-bridged and N-substituted bis(imidazolineylidene) moieties, and WCA (WCA = weakly coordinating anion) representing PF6(-) and [Al(OC(CF3)3)4](-), have been synthesized. 1D and 2D NMR spectroscopy as well as IR spectroscopy, elemental analysis and X-ray crystallog...

Poly(alkylene dicarboxylate)s constitute a family of biodegradable polymers with increasing interest for both commodity and speciality applications. Most of these polymers can be prepared from biobased diols and dicarboxylic acids such as 1,4-butanediol, succinic acid and carbohydrates. This review provides a current status report concerning synthesis, biodegradation and applications of a serie...

Reaction of N-bromosuccinimide with ammonium salt of alkylene (dialkyl) dithiophosphates, [OGOPS(2)NH(4); G=-CMe(2)CMe(2)-CH(2)CMe(2)CH(2)-, CMe(2)CH(2)CHMe(2)-, CH(2)CH(2)CHMe(2)-; (RO)(2)PS(2)NH(4); R=C(2)H(5), n-C(3)H(7), i-C(3)H(7)], in 1 : 1 molor ratio in refluxing benzene solution yields red/brown-colored sticky liquids. These newly synthesized complexes have been characterised by physic...