INTRODUCTION In vascular surgery the crossover iliofemoral bypass grafting is a well-known surgical technique. In general surgery the repair of an abdominal defect using a Polypropylene mesh is also a standard procedure. A particular technique is defined by the performance of these 2 separate procedures inside a single operation in which the crossover arterial graft is directed from the retrope...

Abdomen is a very delicate part of the body. It is prone to trauma and clinical disorders like malignant soft tissues tumors, abdominal hernias are quite common in both young and mature dogs. In massive abdominal wall defects, the use of graft becomes mandatory to achieve desirable results Different techniques have been performed to overcome this challenge. The present study was conducted to fi...

The preparation of composites of synthetic and natural polymers represent an interesting option to combine properties; in this manner, polypropylene and chitosan extruded films using a different proportion of components and polypropylene-graft-maleic anhydride (PPgMA) as compatibilizer were prepared. The effect of the content of the biopolymer in the polypropylene (PP) matrix, the addition of c...

We continue to examine the spectra of polymers because they are important materials, and this exercise makes for an excellent infrared (IR) spectral interpretation review. In installment, we look at more hydrocarbon polymers, including polypropylene polystyrene. IR these materials in detail, see how spectroscopy can be used distinguish them from each other.

Abstract Our work aims to investigate the morphology and properties of natural rubber (NR) dispersed in a polystyrene/silica hybrid nanomatrix. The nanomatrix structure was formed by graft copolymerization vinyltriethoxysilane onto NR grafted with styrene. This composed nanosilica size less than 100 nm, incorporation polystyrene resulted outstanding mechanical viscoelastic properties. tensile s...

Time-of-flight secondary ion mass spectrometry (TOF-SIMS) analyzes chemical information by measuring ions generated via bombardment of an energetic ion beam on the surface of a specimen. Negative hydrocarbon ion species of C2nH are ubiquitous in TOF-SIMS for any hydrocarbon-containing materials, but their utilities are perhaps not fully explored. Using polyethylene, polypropylene, polyisoprene,...