An experiment was conducted for two months in a recirculatory system consisting 12 glass aquaria (size 41× 41 × 46 cm) to evaluate the effects of substrates on the growth and survival of Macribrachium rosenbergii postlarvae (PL). Treatment T1 having no substrate was considered as the control. Treatment T2 contained pieces of hollow PVC pipe, treatment T3 and T4 were provided with high density p...

The focus of this research work is to study the effect hybrid fillers bamboo fiber and commercial glass on high density polyethylene (HDPE) matrix without interfacial coupling agent. composite was formed through melt blending method using two-roll mixing mill at temperature 160 oC shaped compression molding machine. highest value Tensile Modulus break Hardness were obtained ratio 70 % HDPE/ 15 ...

Studies at the Pacific Northwest National Laboratory (PNNL) in Richland, Washington, are being conducted to evaluate nondestructive examinations (NDE) coupled with mechanical testing of butt fusion joints in high-density polyethylene (HDPE) pipe for assessing lack of fusion. The work provides information to the Nuclear Regulatory Commission (NRC) on the effectiveness of volumetric inspection te...

Non-halogenated “all-in-one” flame retardant HDPE.

Olefin fibers, also called polyolefin fibers, are defined as manufactured fibers in which the fiber-forming substance is a synthetic polymer of at least 85 wt% ethylene, propylene, or other olefin units (1). Several olefin polymers are capable of forming fibers, but only polypropylene [9003-07-0] (PP) and, to a much lesser extent, polyethylene [9002-88-4] (PE) are of practical importance. Olefi...

Asphalt functions as an aggregate binder in the road pavement mixture. The rapid construction of roads causes need for asphalt to increase, while its availability is limited. government promoting use natural (Asbuton) alternative oil asphalt. However, performance from Asbuton not good. Uneven content and hardness are factors causing it be less effective a binder. It necessary improve by modifyi...

Disposing of plastic wastes to landfill is becoming undesirable due to legislation pressures, rising costs and the poor biodegradability of commonly used polymers. In addition, incineration meets with strong societal opposition. Therefore, recycling either mechanical or chemical, seems to be the only route of plastic wastes management towards sustainability. Polyolefins, mainly polyethylene (LD...

The nanocavitation distribution in deformed High Density PolyEthylene (HDPE) was investigated. A flat notched sample of HDPE, under steady crosshead speed up to the end stress softening, observed by classical synchrotron parallel beam microtomography and magnified holotomography with a true spatial resolution 0.7 μm 0.05 μm, respectively. Image processing, 3D image segmentation 2D-Fast Fourier ...

The mechanical properties of polyethylene (PE) materials are greatly influenced by their molecular structures, environmental temperature, and strain rate. In this study, static dynamic compression tests were performed on two semicrystalline PE materials—ultrahigh weight (UHMWPE) high-density (HDPE). stress–strain curves HDPE UHMWPE under uniaxial at temperatures −40–120 °C rates 0.001–5500 s−1 ...