Friday 2 March 2018 photo 11/15
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Chemguide polymerisation: >> http://hlj.cloudz.pw/download?file=chemguide+polymerisation << (Download)
Chemguide polymerisation: >> http://hlj.cloudz.pw/read?file=chemguide+polymerisation << (Read Online)
polymerisation of ethene mechanism
polymerisation of ethene equation
addition polymerisation mechanism
addition polymerisation
types of polymerisation
polymerisation conditions
polymerisation definition
condensation polymerisation
The question asked you to say which type of polymerisation produces thermoplastic polymers, and the mark scheme gave the answer "addition polymerisation". This implies that only addition polymers are thermoplastic (thermosoftening). That is simply untrue. PET (mentioned above) is a condensation polymer, as is nylon,
An addition reaction is one in which two or more molecules join together to give a single product. During the polymerisation of ethene, thousands of ethene molecules join together to make poly(ethene) - commonly called polythene.
Condensation polymerisation involves monomers joining together with the loss of a small molecule such as water or HCl. There are two common cases where this happens. One involves the formation of ester linkages to give polyesters such as Terylene; the other involves the formation of amide linkages to give polyamides
This is due to extensive crosslinks between the different polymer chains forming three dimensional network of bonds. Example: Bakelite and melamine. General method of polymerisation. Two major methods generally used for preparing polymers are: a) Addition polymerization. b) Condensation polymerization.
If the main chain of the polymer contains only carbon atoms, then it must be an addition polymer. If the monomer or monomers don't contain carbon-carbon double bonds, then it is condensation polymerisation.
An addition reaction is one in which two or more molecules join together to give a single product. During the polymerisation of ethene, thousands of ethene molecules join together to make poly(ethene) - commonly called polythene.
This page guides you through the mechanism for the polymerisation of ethene by a free radical addition reaction. You will remember that during the polymerisation of ethene, thousands of ethene molecules join together to make poly(ethene) - commonly called polythene.
Polymerisation. To avoid copyright problems with CIE, I can't quote the actual syllabus statements. That means that you must have a copy of this syllabus. If you haven't got one, download a copy from CIE from here. If this link doesn't work, please let me know at once from the address on the about this section page.
I suggest that you just work through the section 10.8 menu as a useful revision. You need to have a good understanding of polymerisation. You may be lucky enough to have a question which talks about familiar polyesters or polyamides or common addition polymers, but you could be faced with completely unfamiliar cases.
When it is being used to make bottles, for example, it is usually called PET. Making polyesters as an example of condensation polymerisation. In condensation polymerisation, when the monomers join together a small molecule gets lost. That's different from addition polymerisation which produces polymers like poly(ethene)
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