- Created by: chris
- Created on: 11-01-12 17:39
CHEMISTRY OF MATERIALS (F334)
MATERIALS REVOLUTION (MR)
A study of condensation polymers and other modern materials. Main ideas :
• condensation polymers;
• amines and amides;
• factors affecting the properties of polymers;
• disposal of polymers.
How Science Works
using scientific knowledge and methodology to modify the properties polymers;
consideration of the benefits and risks associated with the manufacture and disposal of polymers and the decisions facing society.
• polymers (PR);
• amines and amides (EP).
Bonding and structure
(a) explain the term electronegativity; recall qualitatively the electronegativity trends in the Periodic Table; use relative electronegativity values to predict bond polarity in a
covalent bond; decide whether a molecule is polar or nonpolar from its shape and the polarity of its bonds; explain, give examples of and recognise in given examples the
following types of intermolecular bonds: instantaneous dipole–induced dipole bonds (including dependence on branching and chain length of organic molecules), ermanent dipole–permanent dipole bonds, hydrogen bonds (synoptic);
(b) explain and predict the effect of temperature, crystallinity and chain length on the properties of polymers:
temperature – intermolecular bonds have more effect as the temperature is lowered; a polymer softens above its Tm and becomes brittle below its Tg;
crystallinity (regular packing of the chains, due to the regular structure of…