this is a report on the study of high melt flow, highly isotactic polypropylene homopolymer synthesized in liquid monomer using a fifth generation ziegler-natta catalytic system. at highest catalyst productivity, the response of thecatalyst to hydrogen as chain transfer is studied. melt flow rate is controlled by hydrogen as chain transfer from 0.4 to 300 g/10min with changing the amount of hyd...

heterogeneous ziegler-natta and homogeneous metallocene catalysts exhibit greatly different active sitenature in olefin polymerization. in our previous study, it was reported that mgcl2-supported titanocenecatalysts can generate both ziegler-natta-type and metallocene-type active sites according to the type of activators.the dual active site nature of the supported titanocene catalysts was furt...

The effect of nanofilles additives containing copper oxide nanoparticles stabilized by a polymer matrix high-pressure polyethylene obtained the mechanochemical method on features structure and properties metal-containing nanocomposites based isotactic polypropylene was studied using differential thermal (DTA) X-ray phase (XRD) analyzes. improvement strength, deformation rheological parameters, ...

This paper focuses on the calculation of interfacial tension two systems: low-density polyethylene with isotactic polypropylene and high-density syndiotactic polypropylene. For this, three methods to measure are compared: use Palierne's model, Gramespacher Meissner's both based additional elasticity or long relaxation times brought by shape recovery dispersed phase, ab-initio calculation, which...

Four sustainable materials including a recycled polypropylene blend, polybutylene adipate terephthalate, and two grades of polylactic acid are compared to reference isotactic polypropylene. Tensile specimens were produced using two-cavity, hot runner mold with fully automatic cycles per standard industrial practices investigate the effect melt temperature, injection velocity, cycle time, screw ...