1、乙烯

乙烯-醋酸乙烯共聚物（EVA）是由乙烯和乙酸乙烯（VA含量5%-40%）共聚而成的通用高分子聚合物，燃烧时无刺激性气味，其性能随VA含量变化而改变：VA含量越高，透明度、柔软度和坚韧度越高。 根据VA含量不同采用不同聚合工艺：VA含量低于30%采用高压本体聚合（塑料制品），高于30%采用乳液聚合（粘合剂），此外还有溶液聚合（PVC加工助剂）和悬浮聚合。 通过调节VA比例，EVA可满足薄膜、鞋材、热熔胶、电缆护套等多种应用需求，是一种兼具优异柔韧性和加工性能的高分子材料。 (C2H4)x. (C4H6O2)y.

2、醋酸乙烯酯共聚物_化工百科

醋酸乙烯酯共聚物是一种合成树脂，由醋酸乙烯酯和其他单体共聚而成。 它具有以下性质： 化学性质：它具有良好的溶解性，在溶剂中能形成透明的溶液。 它可以与其他树脂和添加剂相容，使其具有可调节的特性。 热性能：醋酸乙烯酯共聚物具有良好的耐热性能和耐老化性能，可以在较高的温度下保持其物理性质和机械性能。 胶粘剂：它具有较高的粘度和粘合力，广泛用于各类胶粘剂的制备。 涂料和油墨：作为增稠剂和分散剂加入涂料和油墨中，提供良好的涂布性能和颗粒分散性。 包装膜和纤维：醋酸乙烯酯共聚物可以用来制备各类包装膜和纤维，具有一定的柔韧性和耐用性。 加聚法：将醋酸乙烯酯与其他单体在引发剂的作用下进行共聚反应，生成共聚物。 间接共聚法…

3、Cationic Alternating Copolymerization of Vinyl Esters and 3

Cationic copolymerization of vinyl acetate and 3-alkoxyphthalides (ROPTs) was demonstrated to proceed using GaCl3 as a Lewis acid catalyst. Both monomers did not undergo homopolymerization, while c...

Transformation of ethylene vinyl alcohol copolymer from a glassy state

This study presented a novel ethylene-vinyl alcohol-acetoacetate ester copolymer (EVOH-A), synthesized via a simple post ester-exchange method. The incorporation of acetoacetic ester not only alters the polymer's phase state but also enhances its potential for further functionalization.

RAFT Polymerization of Vinyl Esters: Synthesis and Applications

In particular, poly (vinyl acetate) (PVAc) and statistical copolymers of vinyl acetate (VAc) with higher vinyl alkylates, have found application as adhesives for porous substrates (e.g., wood, paper and cloth), emulsion paints and as powder additives for construction materials.

Effect of composition and structure of ethylene

In this work, we conduct experimental and computational investigations to examine the alcoholysis kinetics and mechanism of EVA with an ethylene content if less than 50 mol%. Our findings indicate that the overall structure of EVA polymer chain has little effect on the alcoholysis rate.

Emulsion Prepared Vinyl Acetate

Vinyl acetate (VAc) based terpolymers exhibit some outstanding properties. In this review, we report different types of vinyl acetate (VAc) based terpolymers, their preparation via emulsion polymerization, properties, and applications. Emulsion is an environment-friendly industrial polymerization technique.

Process for continuously producing ethylene

本发明涉及一种连续制造乙烯-乙酸乙烯酯的方法,包括使乙烯与乙酸乙烯酯进行溶液共聚合反应,其特征在于使聚合反应的气相部分连接至一不纯物脱除塔并以聚合反应所用的溶剂洗涤该气相部分后,再循环回至反应系统,因而可除去反应所产生的不纯物.

Vinyl acetate copolymer_化工百科

Vinyl acetate copolymer - 简介 醋酸乙烯酯共聚物是一种合成树脂，由醋酸乙烯酯和其他单体共聚而成。 它具有以下性质： 化学性质：它具有良好的溶解性，在溶剂中能形成透明的溶液。 它可以与其他树脂和添加剂相容，使其具有可调节的特性。

Simulation study on the co

Due to the introduction of vinyl acetate monomer, the crystallinity of the polymer is reduced, and its toughness, impact resistance, and thermal sealing performance are improved, which has attracted more and more attention (Wypych and Wypych, 2013, Satpathy et al., 2021).

Acetic anhydride and vinyl acetate are two chemical compounds that can be polymerized to form a copolymer, also known as acetylene-vinyl acetate (AVA) resin. This resin is extensively used in the construction industry due to its excellent properties such as flexibility, strength, and resistance to chemicals. In this article, we will delve into the properties of AVA resin, its applications, and some of the challenges it faces in practical use.

Properties of Acetate Vinyl Ester Copolymer

The acetylene-vinyl acetate (AVA) resin is a thermoplastic material characterized by its high flexibility and toughness. It exhibits good heat resistance, allowing it to withstand elevated temperatures without degradation. Additionally, AVA resin possesses exceptional electrical insulation properties, making it ideal for electrical applications where moisture resistance is critical.

Another notable feature of AVA resin is its ability to absorb shocks and vibrations, ensuring superior mechanical performance. This makes it suitable for construction materials exposed to impact forces. Furthermore, AVA resin demonstrates strong chemical resistance, enabling its use in environments where exposure to corrosive substances is a concern.

Applications of Acetate Vinyl Ester Copolymer

The versatility of AVA resin has led to its widespread adoption across various industries. Key applications include:

1. Construction: AVA resin is commonly employed in paving slabs, pavement tiles, and other building materials. Its flexibility and durability make it ideal for outdoor surfaces subjected to wear and tear.

2. Automotive Industry: AVA resin is utilized in automotive components such as bumpers, fenders, and door panels. Its impact resistance and chemical stability make it a preferred material for these applications.

3. Electrical Engineering: Due to its excellent electrical insulation properties, AVA resin is used in capacitors, switches, and connectors. Its flexibility and toughness enhance signal handling capabilities.

4. Packaging: AVA resin is used to manufacture containers, boxes, and bags. Its chemical and moisture resistance make it suitable for food packaging and other sensitive applications.

Challenges Faced by AVA Resin

Despite its advantages, AVA resin encounters several challenges in practical use. One major issue is its susceptibility to aging. Prolonged exposure to sunlight and air accelerates degradation, reducing its lifespan. Additionally, the high production cost of AVA resin limits its broader adoption in cost-sensitive industries.

Recycling is another significant challenge. Unlike some plastics, AVA resin does not easily break down into smaller molecules during recycling processes, raising environmental concerns.

The acetylene-vinyl acetate (AVA) resin is a versatile and durable material with diverse industrial applications. While challenges such as aging, cost, and recyclability persist, ongoing research aims to improve its sustainability and expand its usability. With continued advancements, AVA resin remains a promising material for future innovations.