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Additional polymerisation - How does it work?

Emma

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Do you mean "addtion polymerisation"? Addition polymerisation happens when double bonds open (the right reaction conditions need to be present) and then join in a chain with other open double bonds, nothing is lost from the original organic molecule - the monomer.

annekh510

26 February 2012

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chemistry heeeeeeelp

(a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6.97 x 10-4 moles/cm3 at 35 C. The diffusivity of CO2 in the polymer is known to be 2.29 x 10-8 cm2/s at this temperature.

How long will it take for 0.001 moles of CO2 to leak from the container at steady-state? Assume that the amount of carbon dioxide in the surroundings is insignificant. Express your answer in hours.

(b) If the diffusivity is observed to double when the temperature is increased by 10 degrees C, what is the activation energy for diffusion? Express your answer in units of eV

Emma

Cracking Hydrocarbons?

At school or revising at home I had no idea about cracking, what the process is or how it works, I nead help fully understanding. I am on higher tier for GCSE science. Thanks a lot.

Emma

how is polythene made?

Emma

what is an addition polymer?

Emma