Lignin, a byproduct of paper and pulp industries, is a sustainable, inexpensive biomaterial with potential as composite filler. Past research on polyolefin/lignin composites made by melt processing has led to modest increases in Young’s modulus and drastic reductions in tensile strength and elongation at break relative to neat polymer. Here, green hybrids of low density polyethylene (LDPE) and ...

BACKGROUND Dezocine, a mixed agonist/antagonist of opioid receptors, has been used in iv patient-controlled analgesia (PCA) pumps for postoperative pain control. The aim of this study was to investigate the physicochemical stability of dezocine solutions in 0.9% sodium chloride for injection for PCA administration. METHODS Solutions of dezocine (0.3, 0.45, or 0.6 mg/mL in 0.9% sodium chloride...

a two-dimensional (2d) single particle model for the copolymerization of propylene-ethylene with heterogeneous ziegler-natta catalyst is developed. the model accounts for the effects of the initial shape of the catalyst and carck/ pore patterns on the copolymer composition, polymerization rate and the average molecular weight properties. the spherical and oblate ellipsoidal shapes of catalyst p...

due to easy availability of cheaper raw material and increase in new applications, the use of polyolefins in variousindustries is becoming a major priority. the middle east region, on account of its vast oil and gas reserves has,in the last decade or so, been developing many new petrochemical complexes with their expansion into colossalpolyolefin production capacities. the predictions are that ...

Abstract Polyolefin fiber is a new type of that was used in concrete to improve some the poor properties including; tensile strength, ductility, and fracture energy. In this research, contribution improving hardened examined by adding polyolefin fibers mix with different content. The polypropylene were added as ratio 0.5, 0.75, 1.0, 1.5, 2% volume. Destructive non-destructive tests carried out:...