Polymerization of Ethylene to Polyethylene

nC2H4 → (–CH2–CH2–)n

概要

Ethylene molecules undergo addition polymerization to form polyethylene, the world's most produced plastic. The C=C double bond opens and links to adjacent monomers. Ziegler-Natta catalysts produce linear HDPE, while radical initiation produces branched LDPE. Over 100 million tonnes are produced annually.

参加者

役割 物質 係数 状態
反応物 Ethylene C₂H₄ 1 (g)

日常の例

Plastic bags, bottles, food containers, and plastic wrap are all made from polyethylene produced by this polymerization reaction.

産業上の重要性

ポリエチレンは年間1億トン以上生産される世界最大のプラスチックであり、包装、建設、自動車、医療用途に使用される。

特性

タイプ
Organic
可逆的
いいえ
エネルギー
発熱性
ΔH
-93.0 kJ/mol
触媒
Ziegler-Natta or metallocene catalysts

関連する反応

Epoxidation of Alkenes (mCPBA) Swern Oxidation Oxidation of Secondary Alcohol to Ketone E2 Elimination (Dehydrohalogenation) Claisen Condensation (Ethyl Acetate) Aldol Condensation of Acetaldehyde Kolbe Electrolysis Baeyer-Villiger Oxidation Beckmann Rearrangement (Cyclohexanone Oxime) Dehydration of Ethanol

Frequently Asked Questions

What is the equation for Polymerization of Ethylene to Polyethylene?
The balanced equation is: nC₂H₄ → (–CH₂–CH₂–)ₙ.
What type of reaction is Polymerization of Ethylene to Polyethylene?
Polymerization of Ethylene to Polyethylene is a organic reaction.
Is Polymerization of Ethylene to Polyethylene exothermic or endothermic?
Polymerization of Ethylene to Polyethylene is exothermic (releases energy). The enthalpy change (ΔH) is -93.0 kJ/mol.
What conditions are needed for Polymerization of Ethylene to Polyethylene?
This reaction requires a catalyst (Ziegler-Natta or metallocene catalysts).