MATS 3011 Lecture Notes - Elastic Modulus, Ultimate Tensile Strength, Stra
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Syllabus: everything until coming monday - exam 2 syllabus. # avg mw, mbarn, sum[ximi] (gaussian curve (bar graphs under it)) (x vs m) (y vs x) Avg chain length (degree of polmerisation) nn = mbarn/mo where mo = monomer molecular weight. Similarly, one ca ndefine wt avg molecular wt (mbarw) mbarw = sum[wimi] where w = wt fraction (w vs m) Glass @ low temperature (rigid, freezes movements, hard, brittle) Viscous liquid @ high t time when load is applied time when load is removed. For a glassy material (@ low t) time -----------------> glassy cold t material = completely recovered, as seen in glass. Matsci page 3 example: silly putty (viscoelastic @ room t)if cool it down, becomes more glassy even with small load, it deforms this = fast strain and then release it after a very short time. --> after release, comes back to original shape/configuration for short time scale, behaves as completely elastic solid.
