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Alkene Polymerization - Ziegler-Natta - Cossee-Arlman

Cossee–Arlman polymerization mechanism for Ziegler-Natta catalyst: (a) traditional Ziegler-Natta catalyst and (b) modified Ziegler-Nat...
Why is silk is so expensive?

Silk is a polymer of protein secretion made by spiders and many insects. The silk is extruded through tubes in the body and drawn ou...
Homogeneous and Heterogeneous Catalysts

Catalysts are classified as homogeneous and heterogeneous. Homogeneous if they are present in the same phase as the reagent. This normally...
Hydrogenation catalysts

Hydrogenation catalysts Key Pint Alkeees are hydrogenated on supported metal particles by a process that involves H 2 dissociation a...
Mass spectrometry

key point: Mass spectrometry is a technique for determining the mass of a molecule and of it fragments. Mass spectrometry measures ...
The examples of catalysis

Almost all the whole of modern chemical industry depends on the development, selection , and application of catalysts . All we can hop...
Chain Reaction in Polymerization

Chain reactions Many gas phase and polymerization reaction are chain reactions, in which a reactive intermediate (which is often ...
The Important Words of Catalyst

Some of the terminology used to describe the rate of a catalytic reaction and its mechanism are introduced as follows. This is urgent to ...
Fischer-Tropsch synthesis

Key point: Hydrogen and carbon monoxide can be converted to hydrocarbons and water by reaction over iron or cobalt catalysts . The co...
What is Chemical Analysis?

If you have a glass of salty water and a glass of sugary water, how do you tell which is which? The easiest way is to taste them. Your to...

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