1、聚乙酸乙烯酯_百度百科
聚乙酸乙烯酯（Polyvinyl acetate，简称PVAc）的研究始于20世纪初。 1912年，德国化学家Fritz Klatte首次通过乙酸乙烯酯的聚合合成了该物质，并获得了相关专利。 在1920年代，随着聚合技术的进步，聚乙酸乙烯酯开始工业化生产，最初用于制造安全玻璃的中间层。
2、Polyethylene vs. Polyvinyl Acetate for Adhesives
Polyethylene vs. Polyvinyl Acetate for Adhesives - What is The Difference? Polyethylene offers excellent chemical resistance and flexibility but has low adhesive properties, while polyvinyl acetate provides strong bonding for porous surfaces due to its water-based and fast-drying nature.
3、Polyvinyl Acetate and Vinyl Acetate
The goal is to develop a hybrid IPN network of polyvinyl acetate (PVAc) and ethylene-vinyl acetate (VAE). In this research work, the vinyl acetate (VAc)/ VAE hybrid emulsion and polyvinyl acetate emulsion (PVAc) were effectively synthesized.
4、聚醋酸乙烯酯_化工百科
中文名:聚醋酸乙烯酯,英文名:Poly (vinyl acetate),CAS:9003-20-7,化学式:C4H6O2,分子量:86.08924,密度:1.18 g/mL at 25 °C,熔点:60°C,沸点:70-150 °C,闪点:>100℃,蒸汽压:86.3mmHg at 25°C,折射率:n20/D 1.467,MSDS.
Poly(vinyl acetate)
Polyvinyl acetate usually contains trace amounts of its precursor, vinyl acetate. One of the metabolites of vinyl acetate, acetaldehyde, is a known animal carcinogen.
聚醋酸乙烯酯
妮秦集团是一家专业研发和制造用于 SMC/BMC、拉挤成型、粘合剂、口香糖基础材料的聚醋酸乙烯酯 PVAC 固体树脂...
聚醋酸乙烯酯 CAS#: 9003
ChemicalBook 致力于为化学行业用户提供聚醋酸乙烯酯的性质、化学式、分子式、比重、密度,同时也包括聚醋酸乙烯酯的沸点、熔点、MSDS、用途、作用、毒性、价格、生产厂家、用途、上游原料、下游产品等信息。
The thermal degradation of poly (vinyl acetate) and poly (ethylene
The thermal degradation mechanism of poly (vinyl acetate) (PVAc) and poly (ethylene- co -vinyl acetate) (EVA) copolymers was investigated with solid-state NMR, thermogravimetry coupled with mass spectrometry and differential thermal analysis.
聚乙酸乙烯酯
聚乙酸乙烯酯溶液或固体树脂，工业上也有使用，用溶液聚合、悬浮聚合或本体聚合制得，主要用作胶黏剂、聚乙烯醇和聚乙烯醇缩醛的原料、口香糖基料等。
Polyvinyl acetate (PVAc)
In its most important application, polyvinyl acetate serves as the film-forming ingredient in water-based (latex) paints; it also is used in adhesives. Vinyl acetate (CH 2 =CHO 2 CCH 3) is prepared from ethylene by reaction with oxygen and acetic acid over a palladium catalyst.
Polyethylene (PE) and polyvinyl acetate (PVAc) are two critical plastic materials in modern industry, playing pivotal roles in fields such as packaging, construction, and electrical insulation. their usage raises environmental concerns and health risks, making it essential to understand their properties and impacts. This article explores their chemical composition, physical properties, applications, and environmental effects to provide a comprehensive understanding.
I. Chemical Composition and Physical Properties
Polyethylene is a nonpolar high-molecular-weight polymer formed through the addition polymerization of ethylene monomers. It exhibits excellent chemical resistance, mechanical strength, and wear resistance, along with low water absorption. With a melting point around 130°C and a heat deflection temperature of up to 140°C, it is ideal for manufacturing pipes and containers.
Polyvinyl acetate, a conjugated diene-type polymer synthesized from vinyl acetate monomers, offers good flexibility and extensibility but lower chemical resistance and mechanical strength. Its melting point is approximately 85°C, and its heat deflection temperature is about 70°C.
II. Applications
Polyethylene’s superior properties make it widely used in industrial products, including plastic bags, films, pipes, sheets, and wire insulation. Its transparency and UV resistance also make it a top choice for outdoor advertising and building materials.
Polyvinyl acetate, due to its flexibility and processability, is commonly employed in films, adhesives, coatings, and cable sheathing. It serves as a diluent for inks in printing and as a raw material for waterproof membranes and flooring in construction.
III. Environmental Impact
The use of polyethylene and polyvinyl acetate poses environmental challenges. Their non-degradable nature can contaminate soil and water if improperly disposed of. Additionally, their production consumes significant energy and generates harmful emissions.
To mitigate pollution, researchers are developing eco-friendly alternatives, such as bio-based and recyclable plastics. These materials offer lower environmental footprints and reduced costs, promoting sustainable development.
IV. Future Prospects
Polyethylene and polyvinyl acetate will continue to advance as industrial demands grow. Technological progress may yield higher-performance plastics, while research into eco-friendly materials will drive green transformation in the plastics industry.
As cornerstone materials in plastics, polyethylene and polyvinyl acetate boast broad applications but also pose environmental challenges. Through innovation and sustainable strategies, these materials can better serve society while minimizing ecological harm.
