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
ChemicalBook 致力于为化学行业用户提供乙烯-醋酸乙烯共聚物的性质、化学式、分子式、比重、密度,同时也包括乙烯-醋酸乙烯共聚物的沸点、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。
3、EVA是什么材料（附EVA材料牌号及相关应用）
化学品英文名称：ethylene-vinyl acetate copolymer eva脚垫在产品结构设计中很常用，再就是eva在产品设计中可以起到减震和缓冲作用。
4、ELVAX™ 460 Ethylene Vinyl Acetate Copolymer
It is an ethylene vinyl acetate copolymer (EVA) designed to offer low sealing temperatures (<100ºC), excellent flexibility, and good optical properties. The acetate level is tailored to provide strong adhesion to polar substrates with an additional feature of increased impact and puncture resistance making this resin well suited for both ...
5、Ethylene Vinyl Acetate_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、 …
Ethylene Vinyl Acetate Copolymer
Explore the versatile Ethylene Vinyl Acetate copolymer, its production, properties, applications, and environmental impact in this detailed article.
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。
乙烯
乙烯-乙酸乙烯酯共聚物是一种生物化学试剂,可作为生物材料或有机化合物进行生命科学相关研究。 (C 4 H 6 O 2. C 2 H 4)x. 1. 性状：白色或淡黄色粉状或粒状物。 2. 密度（g/mL,25/4℃）：0.948. 3. 相对蒸汽密度（g/mL,空气=1）：0.92～0.95. 4. 熔点（ºC）：99. 5. 沸点（ºC,常压）：未确定. 6. 沸点（ºC,5.2kPa）：未确定. 7. 折射率：1.480～1.510. 8. 闪点（ºC）：260. 9. 比旋光度（º）：未确定. 10. 自燃点或引燃温度（ºC）：未确定. 11. 蒸气压（kpa,20ºC）：未确定. 12. 饱和蒸气压（kPa,60ºC）：未确定. 13. 燃烧热（KJ/mol）：未确定. 14.
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.
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乙烯-醋酸乙烯共聚物可作为薄膜用于部分药物中，一般认为它是一种相对无毒和无刺激性的赋形剂。
In the vast realm of modern material science, ethylene-vinyl acetate copolymer (EVOH) has become an indispensable player due to its unique properties and widespread applications. This high-performance polymer is not only favored for its excellent physical characteristics but also valued globally for its environmentally friendly nature. This article provides an in-depth exploration of EVOH, covering its chemical structure, properties, application range, challenges, and future development prospects.
Chemical Structure and Properties Ethylene-vinyl acetate copolymer (EVOH) is a high-molecular-weight compound formed through the copolymerization of ethylene and vinyl acetate. Its molecular structure endows it with distinctive properties. First, its high glass transition temperature ensures minimal solubility in most organic solvents at room temperature, making EVOH an ideal packaging material. Second, EVOH exhibits superior gas barrier and moisture-resistance properties, which are critical in fields such as food, pharmaceutical, and cosmetic packaging. Additionally, its robust mechanical and processing performance broadens its applicability in the production of films, sheets, and other industrial products.
Key Advantages and Limitations The primary advantage of EVOH lies in its exceptional barrier capabilities. Due to its high glass transition temperature, it effectively prevents gas and moisture permeation, preserving the quality of packaged goods. EVOH also demonstrates excellent thermal and chemical stability, maintaining performance under harsh conditions. its drawbacks include higher costs and lower transparency compared to some alternatives, which restrict its use in certain contexts.
Applications EVOH is widely utilized across diverse industries. In packaging, it safeguards food, pharmaceuticals, and cosmetics by shielding them from external contaminants, extending shelf life, and ensuring safety. Beyond packaging, EVOH-based films and sheets play vital roles in sectors like optoelectronics, construction, and advanced materials.
Future Prospects The future of EVOH is rife with opportunities. Rising demand for high-performance, eco-friendly materials driven by technological advancements and improved living standards presents significant growth potential. For instance, refining production processes to reduce costs or developing novel applications—such as biomedical materials and smart materials—could address market needs for sustainable, high-functionality solutions.
As a high-performance, environmentally friendly polymer, EVOH holds immense promise. Through continuous innovation and industrial upgrades, EVOH is poised to expand its impact across various domains, contributing significantly to human progress.
