Ethylene-Vinyl Acetate Polymer

1、乙烯

EVA是乙烯-醋酸乙烯共聚物，它是由乙烯（E）和乙酸乙烯（VA）共聚而制得，英文名称为：Ethylene Vinyl Acetate，简称为EVA，或E/VAC。

2、乙烯

乙烯-醋酸乙烯共聚物（EVA）是由乙烯和醋酸乙烯按照不同的比例共聚而得，EVA这个英文缩写中的E就代表乙烯成分，VA代表醋酸乙烯成分，其性能与醋酸乙烯（VA）的含量密切相关，根据VA含量的不同可以分为三类：VA含量在5%-40%称EVA塑料，主要用于聚乙烯改性、制造电线电缆、薄膜极其他成型制品和混合料等；VA含量在40%-90%称为EVA橡胶，主要用于橡胶、电缆和汽车工业部件；VA含量高于90%称为聚醋酸乙烯乳液，主要用于粘合剂、涂料等。乙烯-醋酸乙烯共聚物具有良好的耐冲击和耐应力开裂、柔软性、高弹性、抗穿刺以及化学稳定性、电性能较好、生物相容性好，同时密度低，且与填料、阻燃剂有较好的相容性。

3、EVA_化工百科

EVA是乙烯和醋酸乙烯的无规共聚物，由于在乙烯链中引入了具有极性的醋酸基团所形成的短支链，改变了原来的结晶状态，使得EVA较聚乙烯更富有柔韧性和弹性。 EVA树脂的性能与醋酸乙烯的含量和熔体流动速率有关，当MFR一定时，与醋酸乙烯含量的增高，其弹性、柔韧性、相容性和透明性等均有所提高，结晶度下降；而随着醋酸乙烯含量的降低，则性能接近于聚乙烯，刚性增大、耐磨性和电绝缘性能提高。若醋酸乙烯含量一定，当MFR增加时，则软化点下降，加工性和表面光泽得到改善，但力学强度有所下降；反之，随着MFR的降低，则分子量增大，冲击性能和耐应力开裂性能有所提高。 EVA常作为改性剂与其他聚合物共混，这是由于EVA具有良好的挠曲性、 …

4、Ethylene Vinyl Acetate (EVA) Polymers

Ateva® G ethylene vinyl acetate (EVA) grades are used in medical plastic applications such as tubing, devices, medical bags, and packaging. These products are certified to meet USP Class VI standards.

5、Ethylene Vinyl Acetate

Ethylene Vinyl Acetate, typically abbreviated as EVA, is a versatile and ubiquitous polymer. Often described as a copolymer of ethylene and vinyl acetate, EVA is widely used in various industries due to its excellent blend of properties, including flexibility, toughness, and resilience.

Ethylene

EVA is ethylene-vinyl acetate copolymer, which is made by copolymerization of ethylene (E) and vinyl acetate (VA). Its English name is: Ethylene Vinyl Acetate, referred to as EVA, or E/VAC.

Ethylene vinyl acetate (EVA) and ethylene butyl acrylate (EBA)

Ethylene vinyl acetate copolymers (EVA) are thermoplastic polymers comprised of repeated units of ethylene and vinyl acetate. A more elastomeric product than polyethylene. It stands out for its excellent processability, flexibility and compatibility.

eva塑料_百度百科

乙烯／醋酸乙烯酯（ethylene vinyl acetate，简称为EVA或E/VAC）又称乙烯／乙酸乙烯酯，是由乙烯和乙酸乙烯酯聚合制成的共聚物合成材料。

Ethylene

Ethylene-vinyl acetate copolymer (CAS 24937-78-8) information, including chemical properties, structure, melting point, boiling point, density, formula, molecular weight, uses, prices, suppliers, SDS and more, available at Chemicalbook.

Ethylene

Ethylene-vinyl acetate (EVA) is defined as a polar copolymer of ethylene and vinyl acetate that offers increased flexibility, elongation, and impact resistance compared to polyethylene. It is commonly used in applications such as flexible packaging, heat sealing, and as an adhesion layer in laminates.

Topic: Polymers of Ethylene and Vinyl Acetate

In the field of modern materials science, polymers are widely utilized across various industries due to their unique physical and chemical properties. Among these, ethylene-vinyl acetate (EVA) polymers stand out as a brilliant gem in polymer research due to their excellent performance. This article provides an in-depth exploration of the properties, applications, and future development trends of ethylene-vinyl acetate polymers, aiming to offer readers a comprehensive and profound understanding.

I. Properties of Ethylene-Vinyl Acetate Polymers

Ethylene (C₂H₄) is a linear unsaturated hydrocarbon with a double bond in its molecular structure, endowing it with high chemical reactivity. When ethylene undergoes polymerization with other monomers, it forms diverse polymers. The copolymer of ethylene and vinyl acetate, known as EVA, is a common thermoplastic elastomer (TPE) characterized by its flexibility, oil resistance, and chemical resistance.

Physical Properties The physical properties of EVA polymers depend on their composition. Generally, higher ethylene content increases the polymer’s hardness and rigidity, while higher vinyl acetate content enhances flexibility and elongation. Additionally, increasing ethylene content lowers the melting point of EVA, making it suitable for low-temperature environments.
Chemical Properties EVA polymers exhibit strong corrosion resistance against most chemicals, including acids, alkalis, and salts. The polar vinyl acetate groups also provide antistatic and flame-retardant properties, enabling widespread use in packaging, wire and cable insulation, and footwear materials.

II. Applications of EVA Polymers

EVA’s unique properties have led to its versatile applications across multiple fields:

Packaging Materials Due to its transparency, softness, and weather resistance, EVA is extensively used in food, pharmaceutical, and cosmetic packaging. For example, EVA films offer excellent oxygen barrier properties, extending product shelf life, while their tear resistance and abrasion resistance ensure practical usability.
Wire and Cable EVA’s superior insulation and aging resistance make it ideal for wire and cable insulation or sheathing. Its stability under high-temperature and humid conditions ensures safe operation of electrical systems.
Footwear Materials EVA’s exceptional wear resistance and flexibility have positioned it as a key material in sports shoes, slippers, and other footwear. Its high resilience maintains comfort even after prolonged use.

III. Future Development Trends

Advancements in technology and rising demands drive continuous innovation in EVA polymers. Key future trends include:

High Performance Researchers are working to enhance EVA’s mechanical strength, heat resistance, and chemical resistance by incorporating functional monomers or adopting advanced synthesis techniques.
Biodegradability With growing environmental awareness, developing biodegradable EVA polymers is a critical focus. This may involve creating bio-based monomers or optimizing production processes.
Multifunctionality To meet diverse application needs, future EVA polymers may integrate functionalities such as antimicrobial or UV-resistant additives, expanding their usability in new domains.

As a vital polymer material, ethylene-vinyl acetate polymers boast outstanding physical and chemical properties, demonstrating significant practical value in packaging, wire and cable, and footwear. Looking ahead, driven by technological progress and environmental requirements, EVA polymers are poised for growth in high-performance, biodegradability, and multifunctionality. We believe that ethylene-vinyl acetate polymers will play an increasingly vital role in the future of materials science.