The exceptional low permeability to oxygen and water of PVDC the retention barrier properties even in humid conditions explain its success for packaging food industry as layer Polyolefins (PO) multilayer films, whose contribution reduction waste is largely recognized. Several chemical recycling technologies have emerged recent years that, together with methodologies based on separation layers b...

The results of a study mixing compositions based on polypropylene and vegetable fillers modified with an enzyme preparation are presented. During the experiment, optimal modification time ratio volume water to mass filler during were determined. Physical mechanical tests revealed that composites superior basic without modification.

Due to easy availability of cheaper raw material and increase in new applications, the use of polyolefins in various industries 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 colossal polyolefin production capacities. The predictions are th...

Polyolefins are of vast economic importance, which is reflected by an annual production of more than 70 million tons of polyethylene and polypropylene. While the major portion of these materials is produced with Zieglerand chromium-based catalysts, the older free-radical process that affords low-density polyethylene (LDPE) has maintained its significance.[1] Despite the necessity of working at ...

Copolymerisation of carbenes and olefins (ethene), mediated by Rh-based catalyst precursors, is presented as a new, proof-of-concept methodology for the controlled synthesis of functional polymers. The reactions studied show that olefin-carbene polymerisation reactions provide a viable alternative to more traditional olefin polymerization techniques. Rh(III)-catalyst precursors, while active in...

Patterns in molecular topology and complexity for long-chain branching are quantitatively described. The Wiener number, the topological complexity index, and a new index of 3-starness are used to quantify polymer structure. General formulas for these indices were derived for the cases of 3-arm star, H-shaped, and B-arm comb polymers. The factors affecting complexity in monodisperse polymer syst...

............................................................................................................................... i Co-Authorship Statement.................................................................................................... ii Acknowledgments.............................................................................................................. iii Table of