Improving Some Mechanical Properties and Thermal conductivity of PMMA Polymer by using Environmental Waste

Abstract

This study was achieved to satisfy two goals, the first of which is to treat an environmental problem represented by the disposal of date seeds, and the second is the use of these wastes to improve some mechanical and thermal properties of poly methyl methacrylate PMMA through strengthening different proportions of the powder of date seeds.
 Particles of date seeds were used as a natural strengthening material for PMMA polymer, by mixing the matrix material (resin) with the hardener while still stirring continuously for a period of 10 min. After that, the samples of the reinforced material were prepared by adding the powder of date seeds, which is the reinforcing substance, with different percentages of weight fraction (0, 0.5, 1, 2, 3, 5 wt. %) and a grain size of <75 µm, while continuing to stir (10 min) for a second time. The composite samples were prepared by the Hand-Lay-up method and cut according to the standard ASTM. Thermal conductivity and some mechanical properties, such as impact strength, tensile strength, compressive strength, flexural strength, and hardness, were studied. An improvement was found in all properties at the reinforcement rate of 1-2 wt. %.

Mechanical Features of PMMA Microfluidic Chips Implemented by Carbon Dioxide Laser

“…This phenomenon may be explained by the fact that improved surface qualities reduce the likelihood of cracks and enhance the quality of mechanical properties. The finding that mechanical characteristics increase as laser power increases and scanning speed decreases is consistent with other results that have been reported [3,6,[11][12][13]. Laser powers of (20, 40, 60 W) and laser scanning speed of (250, 350, and 500 mm/s).…”

“…Chloroform adhesive was chosen as it is considered to be biocompatible, thereby removing concerns about direct contact with materials inside the microchannels. Figure (3) shows sharp peaks due to the following elements: carbon (45.49 %), and oxygen (16.51%) in addition to chlorinel. Figure (4) shows the enery-dispersive X-ray (EDX) spectra for the elemental composition of PMMA and the chloroform adhesive.…”

“…The primary characteristics of this class of polymers are their great chemical stability, mechanical strength, lightweight nature, and ease of fabrication [2]. PMMA has been used in various applications, including the automotive sector, optoelectronics, and microfluidic chips, as well as in certain medical applications, equipment, aerospace, and architecture [3]. To develop a direct, controlled, and low-cost manufacturing procedure for polymer-based microfluidics, an increasing number of researchers have done numerous studies in laser ablation processing microfluidic chips.…”

Anatomical, Radiological, and Corrosion Casting of the Liver, Gallbladder, and Biliary Duct System of Local Breed Cattle (Bos ttaurus)

“…Chosen for its consistent size, favorable viscosity at room temperature, and ability to flow through microchannels effectively. Its high hardness is crucial for maintaining organ structural integrity during maceration [18], [19]. After confirming the absence of pathological lesions and congenital abnormalities, a plastic catheter was inserted and securely fastened to prevent resin leakage.…”