SULFUR-VULCANIZATION OF CIS-1, 4 POLYBUTADIENE/POLYETHY-LENE-BUTADIENE GRAFT COPOLYMER BLENDS

Comprehensive Kinetic Numerical Model for NR and High-Cis Poly-Butadiene Rubber Blends

A simple but robust kinetic mathematical model to predict the mechanical/thermal behaviour of NR and highcis polybutadiene rubber blends is presented. The benchmark blend is a 70% NR with 30% high-cis polybutadiene blend vulcanized in presence of sulphur at 1 phr and single accelerants TBSS or DPG at concentrations equal to 1-0 and 0-1 respectively. Experimental rheometer curves are at disposal...

(η4-s-cis-1,3-Butadiene)tetra­carbonyl­chromium(0)

In the title complex, [Cr(C(4)H(6))(CO)(4)], the Cr(0) atom shows a distorted octa-hedral environment from four C atoms of the carbonyl ligands and the two π-bonds of the s-cis-1,3-butadiene ligand. The complex has an approximate non-crystallographic mirror symmetry m passing through the chromium atom, two carbonyl ligands and the mid-point of the central C-C bond of the s-cis-1,3-butadiene lig...

Graft Issue 4/1

Redetermination of (η4-s-cis-1,3-butadiene)tricarbonyl­iron(0)

The crystal structure of the title compound, [Fe(C(4)H(6))(CO)(3)], was previously reported by Mills & Robinson [Acta Cryst. (1963) ▶, 16, 758-761]. The compound crystallizes in the centrosymmetric space goup Pnma with the complex located on a mirror plane. The redetermination of this structure at 100 K yielded almost equilibrated C-C bond lengths within the butadiene ligand according to a meta...

Electric-field-induced alignment of block copolymer/nanoparticle blends.

External electric fields readily align birefringent block-copolymer mesophases. In this study the effect of gold nanoparticles on the electric-field-induced alignment of a lamellae-forming polystyrene-block-poly(2-vinylpyridine) copolymer is assessed. Nanoparticles are homogeneously dispersed in the styrenic phase and promote the quantitative alignment of lamellar domains by substantially lower...