Day 16 X-ray Diffraction and polymers intro
0:00 reading quiz
6:08 review of X-ray diffraction principles and Bragg's law
10:00 theta vs 2 theta
10:44 hkl miller indices
15:40 interplanar spacing, d, calculation for different crystal systems
21:08 worked example solving for d for given hkl values
25:10 not all Bragg's law conditions lead to reflections, FCC, BCC hkl requirements for reflections
26:21 example problem working out third lowest 2theta reflection hkl in FCC copper
32:26 amorphous vs crystalline materials
35:40 polymers intro, natural vs synthetic polymers, hjstory of polymers
39:30 simple hydrocarbon molecules and polymers, carbon bond angle
41:43 melting point, boiling point as a function of chain length in paraffin family
44:28 example question of butane vs isobutane boiling point
46:22 other radical groups
47:58 polymerization process, free radical role, monomer into polymers