Structure and dynamics of ring polymers

بررسی سیستم های پلیمری حاوی گروه های پر انرژی تترازول(علمی-ترویجی)

Tetrazoles are cyclic aromatic compounds that include four nitrogens and one carbon atom in one ring .These compounds have many applications in civil and military industries. These compounds can produce great amount of N2 after burning and for this reason they have a little environmental contamination and are considered as green explosive materials. Introduction of tetrazoles in polymeric chain...

Chemical modification of maleic anhydride polymers with carbazole

Maleic anhydride (MAN) copolymers with methyl methacrylate(MMA), ethyl methacrylate(EMA), methyl acrylate(MA), ethyl acrylate (EA) and buthyl acrylate (BA) ( in a 1:1 mole ratio) were synthesized by free radical polymerizations method under vacuum -azobis(isobutironitrile)(AIBN) as an initiator of reaction at 701C. The copolymer compositions were determined using related 1H NMR spectra techni...

Cost Comparison of Ring Spun Yarn of China Hui Hong Polyester Fiber and Blended Yarn of Khalis and PSL Polyesters Fiber

Nanoparticle Motion in Entangled Melts of Linear and Nonconcatenated Ring Polymers

The motion of nanoparticles (NPs) in entangled melts of linear polymers and nonconcatenated ring polymers are compared by large-scale molecular dynamics simulations. The comparison provides a paradigm for the effects of polymer architecture on the dynamical coupling between NPs and polymers in nanocomposites. Strongly suppressed motion of NPs with diameter d larger than the entanglement spacing...

Synthesis, Crystal Structure and Antibacterial Evaluation of Di-μ-chlorido-bis({2-[(4-methoxyphenyl)- iminomethyl]pyridine-κ2N,N']Mercury(II)

New coordination polymer of [HgLCl2]n (1) with HgCl2 and Schiff base bidentate ligand (4-methoxyphenyl) pyridine-2yl methyleneamine (L) was prepared and structurally characterized. In the 1D network structure of 1, the mecury (II) ion adopts an HgN2Cl3 distorted square pyramid geometry. In this complex, one of the chlorine acts as bridging ligand connecting two adjacent mercury(II) ions while, ...