OCR B (Salters) - F334 - Chemistry of Materials - The Materials Revolution

A detailed set of notes on the MR module in the F334 Chemistry of Materials exam from the OCR B (Salters) examination board

Link to my notes on "What's in a Medicine?"

http://getrevising.co.uk/resources/ocr_b_salters_f334_chemistry_of_materials_whats_in_a_medicine

Link to my notes on "The Steel Story"

http://getrevising.co.uk/resources/ocr_b_salters_f334_chemistry_of_materials_the_steel_story

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  • Created by: Michael
  • Created on: 23-12-12 12:52

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SANDOWN BAY ACADEMY




OCR Chemistry B (Salters)
Notes, Task Sheets, Questions and Answers
Michael Chard




This document consists of notes from all kinds of sources, answers to task sheets given out during
lessons (which have not been carried out on paper) and any questions from text books and any
relevant…

Page 2

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OCR Chemistry B (Salters)
Michael Chard
Table of Contents
The Materials Revolution (MR) ............................................................................................................... 3
Electronegativity and Intermolecular Forces ...................................................................................... 3
Electronegativity ............................................................................................................................. 3
Polar Molecules............................................................................................................................... 3
Intermolecular Forces ..................................................................................................................... 4
Amines, Amides and Hydrolysis .......................................................................................................... 5
Amines ............................................................................................................................................ 5
Amides ............................................................................................................................................ 5
Forming Alcohols from Hydrolysis .................................................................................................. 6
Recrystallisation…

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OCR Chemistry B (Salters)
Michael Chard


The Materials Revolution (MR)

Specification:

A study of condensation polymers and other modern materials

The chemical ideas in this module are:

Condensation polymers;
Amines and amides;
Factors affecting the properties of polymers;
Disposal of polymers.

Electronegativity and Intermolecular Forces

Electronegativity

The ability to attract…

Page 4

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OCR Chemistry B (Salters)
Michael Chard
o Lone pairs of electrons on the central atom also have an effect on the overall
polarity and may cancel out the dipole created by the bonding pairs ­ causing it to
be non-polar overall.

Intermolecular Forces

Intermolecular forces are very weak
They are…

Page 5

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OCR Chemistry B (Salters)
Michael Chard
Amines, Amides and Hydrolysis

Amines

Amines are organic derivatives of ammonia
If one or more hydrogen's in ammonia is replaced with an organic group, R, you get an
amine
o You get 3 types of amines:
Primary amines (the N is attached to one…

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OCR Chemistry B (Salters)
Michael Chard
There are two ways of hydrolysing amides. Acidic or basic conditions
Acidic
o Heat it with dilute acid to get a carboxylic acid and ammonium salt
Basic
o Heat it with dilute alkali to get a carboxylate ion and ammonia gas

Forming Alcohols from…

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OCR Chemistry B (Salters)
Michael Chard
The individual, small alkenes which have joined up together to form the polymer is called a
monomer.

Condensation Polymers

Include polyesters, polyamides and polypeptides
o Polyamides are made by condensing diamines and dicarboxylic acids.
o Polyesters are made by condensing diols and dicarboxylic acids…

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OCR Chemistry B (Salters)
Michael Chard
o Once they've been used plastic items are thrown away. A lot of this is just buried as
landfill, where it can take a very long time to decompose
o Burying plastic means more has to be manufactured to make new products ­ using…

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OCR Chemistry B (Salters)
Michael Chard
Tm and Tg

Tm

This stands for melting point and all thermoplastics have one
If you heat a thermoplastic polymer to above its melting point, it will soften and then melt
This is because the heat energy that is being added, disrupts the intermolecular…

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OCR Chemistry B (Salters)
Michael Chard


Modifying Polymer Properties

MODIFICATION EXPLANATION EXAMPLE
Copolymerisation By mixing monomers Making a styrene-butadiene copolymer
you will end up with a Polystyrene has a high glass transition
polymer chain that temperature, so it is very hard, but
has different brittle at room temperature
polymers made…

Comments

Layla

You are bloody brilliant!


Layla

Got anything on f335?

Michael

Hi Layla - Thanks! Sorry, I haven't done notes for F335! I've gone for the approach of cramming my head and doing the past papers again and again!

Louisa

AMAZINGLY HELPFUL!

Michael

Glad to help Louisa!

safa

these are all soooo amazing!!!! Where have these been all my life

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