This study was performed in the framework of a research program focused in the development of high tenacity polypropylene (PP) fibres for the reinforcement of cementitious composites. Precedent reports have demonstrated how micromechanical modelling was used to attain significant improvements with respect to the macroscopic properties of cementitious composites. These improvements have been bas...

hemicellulose of southern yellow pine wood spices was extracted by pressurized hot water at three different temperatures: 140°c, 155°c and 170°c. compounding with pp (polypropylene) was performed by extrusion after preparing wood flour and sieving to determine its mesh size. the ratio of wood to polymer was 50:50 based on oven-dry weight of wood flour. all extraction treatments and control samp...

The moisture sensitivity of wood–polymer composites (WPCs) is mainly related to their hydrophilic wood components. Coatings are among the alternatives that improve dimensional stability these composites. However, adhesion most coatings WPC surface generally poor. Thus, chemical and/or mechanical treatments should be applied coating adhesion. Therefore, main objective this study was polypropylen...

OBJECTIVES Synthetic mesh surgery for both abdominal and urogenital hernia repair is often unsatisfactory in the long-term due to postoperative complications. We hypothesized that a semi-degradable mesh hybrid may provide more appropriate biocompatibility with comparable mechanical properties. The aim was to compare its in vivo biocompatibility with a commercial polypropylene (PP) mesh. METHO...

To improve the economic benefits of engineered cementitious composites and control repair cycle, materials were designed, with key components mixture being low-cost polypropylene (PP) fibers fast-setting sulfoaluminate cement. The effects water/binder ratio, fiber content, aggregate particle size on flowability, mechanical properties, toughness fiber-reinforced composite (PP-SACC) explored. Bas...

The use of synthetic fibers as reinforcement in fiber-reinforced cementitious composites (FRCC) demonstrates a combination better ductile response vis-à-vis metallic ones, enhanced durability high pH environment, and resistance to corrosion well self-healing capabilities. This study explores the effect macro- micro-scale polypropylene (PP) on post-crack energy, ductility, potential FRCC. Labora...

In this paper, glass fiber-reinforced polypropylene (GF50-PP) composite composed of long fibers was prepared by the thermo-compression process for very first time. This presents high mechanical strength and is used in infrastructures, which demand resistance against severe conditions. Mechanical multi-scale damage analysis GF50-PP at ambient cryogenic temperatures have been investigated study u...

Knowledge of the mechanisms controlling crack formation, propagation and failure of FRCC under shear loading is currently limited. This paper presents a study that utilized photogrammetry to monitor the shear deformations of two FRCC materials and ordinary concrete (OC). Multiple shear cracks and strain hardening of both FRCC materials was observed under shear loading. The influence of fibers, ...

In recent times, the applications of fiber-reinforced recycled aggregate concrete (FRAC) in practical engineering have gained greater popularity due to its superior mechanical strength and fracture properties. To apply FRAC buildings other infrastructures, a thorough understanding residual properties durability after exposure fire is highly important. According established research, volume frac...

We studied Ca(2+) dependence of tension and actomyosin ATPase rate in detergent extracted fiber bundles isolated from transgenic mice (TG), in which cardiac troponin I (cTnI) serines 43 and 45 were mutated to alanines (cTnI S43A/S45A). Basal phosphorylation levels of cTnI were lower in TG than in wild-type (WT) mice, but phosphorylation of cardiac troponin T was increased. Compared with WT, TG ...