A rare form of intoxication: acute methyl ethyl ketone peroxide poisoning

We report two suicidal cases of acute methyl ethyl ketone peroxide (MEKP) poisoning. A woman in her late 60s suffered from oral mucosal erosion, functional impairment of the heart, liver and other organs, pulmonary inflammation, elevated inflammatory markers, pleural effusion, hypoproteinemia and metabolic acidosis after oral administration of approximately 50 mL of MEKP. After admission, the patient was administered hemoperfusion four times, 8 mg of betamethasone for 6 days and symptomatic support. Hemoperfusion had an obvious effect on the treatment of oral MEKP poisoning. After discharge, the patient developed progressive dysphagia and secondary esophageal stenosis. Supplementary feeding was administered with a gastrostomy tube after the patient was completely unable to eat. A man in his mid-40s developed oropharyngeal mucosal erosion, bronchitis and esophageal wall thickening after oral administration of 40 ml MEKP. After receiving total gastrointestinal dispersal, 80 mg of methylprednisolone was administered for 7 days, and symptomatic supportive treatment was provided. Slight dysphagia was observed after discharge, and there was no major effect on the quality of life. Patients with acute oral MEKP poisoning should be followed up regularly to observe its long-term effects on digestive tract corrosion and stenosis.

The Tensile and Flexural Forces of Acropora Reef Waste Particulate-Enchanced Polyester Composites

Composite is a material that combines two or more materials that basically dissimilar chemical or physical properties from one another. In this research, we used Acropora coral reef waste particulate and Resin Polyester BQTN type 157 with Methyl ethyl ketone peroxide (MEKP) 1% as the hardener. The Hand Lay-Up molding technique is used in the process of making the material. The tensile and flexure test is done according to the ASTM D3090 and ASTM D790 – 03 standards. The purpose of this research is to discover the means to produce a composite enhanced by Acropora coral reef waste with polyester matrix and to learn the tensile and flexure strength from the Acropora coral reef waste particulate-enhanced polyester composites with mass fraction varieties of 10%, 20%, 30%, and 40%. The tensile test result of Acroporal coral reef waste particulate with polyester matrix yields average tensile strength at mass fraction variety of 40% with a score of 19,66 MPa, with an Modulus score of 636,75 MPa. The flexure test result of Acropora coral reef waste particulate with polyester matrix yields average flexure stress at mass fraction variety of 40% with a score of 112,56 MPa, with an average Elastic Modulus score of 3098,96 MPa.

Study of Experimental Investigations in the Presence of Ceramic Waste Powder

The paper aims to evaluate the gel time and exotherm temperature properties of the curing of unsaturated polyester resin at various amounts of Methyl ethyl ketone peroxide, cobalt octoate and porcelain powder. The gel time of samples are determined using the simple method, while the exotherm temperature are evaluated using the thermocouple. The variation of these properties is discussed theoretically and experimentally.

NGHIÊN CỨU SỬ DỤNG XƠ DA THUỘC PHẾ LIỆU ĐỂ CHẾ TẠO VẬT LIỆU COMPOSITE NỀN NHỰA POLYESTER KHÔNG NO

Nghiên cứu này trình bày các kết quả khảo sát ảnh hưởng của nồng độ dung dịch polyester không no (UPE), hàm lượng chất đóng rắn methyl ethyl ketone peroxide (MEKP), hàm lượng xơ da, tỷ lệ khối lượng phối trộn xơ da với sợi thủy tinh và mùn cưa trong cốt gia cường đến thời gian đóng rắn, độ bền cơ học, sự phân bố các pha và màu sắc của vật liệu composite thu được. Xơ da sử dụng trong nghiên cứu là các loại xơ được nghiền từ phế liệu da thuộc phát sinh trong quá trình sản xuất giầy dép. Trong khoảng khảo sát về nồng độ dung dịch UPE (40 – 60%), chất đóng rắn MEKP (1 – 2%), hàm lượng xơ da (7 – 11%), tỷ lệ khối lượng phối trộn xơ da/sợi thủy tinh (50/50), xơ da/mùn cưa (50/50) và xơ da/sợi thủy tinh/mùn cưa (40/30/30) trong cốt gia cường, điều kiện thích hợp để chế tạo vật liệu composite là UPE 60%, MEKP 1% và xơ da 7%. Điều kiện này đảm bảo thu đƣợc vật liệu có tính chất cơ học (độ bền kéo, độ bền va đập và độ bền nén) tương đối tốt. Mẫu có tỷ lệ khối lượng phối trộn xơ da/sợi thủy tinh (50/50) có độ bền cơ học và phân bố pha tốt nhất. Kết quả từ nghiên cứu này bước đầu cho thấy khả năng sử dụng xơ da thuộc phế liệu để chế tạo các loại vật liệu mới có khả năng ứng dụng trong dân dụng và công nghiệp.

Experimental Evaluation of the Curing of Unsaturated Polyester Resin at Various Amounts of Methyl Ethyl Ketone Peroxide, Cobalt Octoate and Porcelain Powder

The goal of this research is to investigate the impact of the three parameters on the cure of the unsaturated polyester resin. The obtained values show the influence of each parameter on the cure and hence enables to establish a time-range with regard of the percentage of the components for a good management of the curing process.

Effect of catalysts amount on mechanical properties of polymer concrete

Polymer materials are used in different engineering applications because of their excellent engineering properties. The use of these materials in different engineering fields has increased in recent years. It is predicted that polymer materials will be one of the most remarkable and popular engineering materials in the near future because of their unique properties. This paper focuses on Methyl Ethyl Ketone Peroxide (MEKP), which is one of the main catalysts and investigate its effect on the mechanical properties of Polymer Concrete (PC). The main aims of the study are to understand the mechanical properties of the polymer concrete including different amount of MEKP and to investigate the influence of MEKP on the mechanical characterizations of the PCs. For this purpose, five different samples containing 0.15% (Mixture-1), 0.25% (Mixture-2), 0.35% (Mixture-3), 0.45% (Mixture-4) and 0.55% (Mixture-5) MEKP of the total weight were prepared and some experimental studies were performed on the prepared mixtures. The obtained strength values were discussed and evaluated effect of MEKP on mechanical properties of PCs.