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Overview

4-Methyl-1-pentene is a branched unsaturated hydrocarbon belonging to the alkene family. Its molecular structure features a double bond at the first carbon and a methyl group at the fourth position, giving it distinct chemical reactivity compared to linear alkenes. First synthesized in the mid-20th century, this compound has gained industrial importance primarily as a co-monomer in polyolefin production. The chemical is produced through catalytic oligomerization of ethylene or by dehydration of corresponding alcohols. While not as widely used as some other alkenes, it serves niche applications where its specific branching pattern and reactivity are advantageous, particularly in creating polymers with tailored properties.

Physical and Chemical Properties

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As a liquid at room temperature, 4-methyl-1-pentene exhibits typical alkene characteristics including low viscosity and high volatility. Its branched structure results in slightly different physical properties compared to linear hexenes, notably a lower boiling point and density. The compound's refractive index (approximately 1.388 at 20°C) and vapor pressure (about 300 mmHg at 20°C) are important parameters for industrial handling. Chemically, the double bond makes it reactive toward electrophiles and free radicals. It readily undergoes addition reactions including hydrogenation, hydroformylation, and polymerization. The branching at the 4-position influences reaction kinetics and product distributions in catalytic processes, sometimes offering advantages over linear isomers in specific synthetic applications.

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护套进线端出线端区分

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Main Applications

The primary industrial use of 4-methyl-1-pentene is as a co-monomer in the production of specialty polyolefins. When copolymerized with ethylene or propylene, it introduces controlled branching that can modify polymer crystallinity, transparency, and impact resistance. These materials find use in packaging films, medical devices, and high-clarity containers. In fine chemical synthesis, the compound serves as a building block for more complex molecules. Pharmaceutical intermediates, flavor compounds, and specialty surfactants may incorporate 4-methyl-1-pentene derivatives. Research applications include its use as a model compound in catalysis studies, particularly for investigating steric effects in metal-catalyzed reactions.

Safety and Storage

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As a highly flammable liquid (Flash point: -23°C), 4-methyl-1-pentene requires careful handling with appropriate fire prevention measures. Storage should be in tightly sealed containers under nitrogen atmosphere when possible, at temperatures below 30°C. Compatibility with common container materials is good for stainless steel and polyethylene, but aluminum and certain plastics should be avoided. Personnel handling this chemical should use appropriate PPE including chemical goggles, gloves, and flame-resistant clothing. Ventilation requirements include explosion-proof equipment when concentrations may approach the lower explosive limit (1.1% by volume). Spill management requires non-sparking tools and inert absorbents, with collected material treated as hazardous waste.

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油管钢丝护套

本文从油管钢丝护套的材料特性、应用场景及性能优化三个方面展开，解析其在工业领域的关键作用与常见问题解决方案，为相关从业者提供实用参考。

B2B Procurement Guide

Industrial buyers should specify required purity levels (typically 95-99%) and may request certificates of analysis for critical applications. Technical grade suffices for most polymerization uses, while synthetic applications may require higher purity. Bulk shipments usually come in isotanks or drums, with smaller quantities available in lab-scale containers. Quality indicators include low peroxide content (stabilizers are often added), minimal moisture, and absence of polymerization inhibitors unless specified. Lead times can vary from weeks to months depending on production schedules. Strategic buyers may consider long-term contracts due to periodic supply fluctuations in the C6 olefin market.

Overview

Physical and Chemical Properties

Main Applications

Safety and Storage

B2B Procurement Guide

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