CHE 10 NOTES (after MT1)

CHE 10 NOTES (after MT1) - PropertiesofPolymers 22:09...

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Properties of Polymers 22:09 -Properties of polymers -Glass transition temp.  glasses  amorphous flow crystalline  oooo  rigid, organized, brittle (fibers)        oooo       oooo amorphous elastomers, flexible, tangled cool materials rigid/crystalline prop. Glass transition temp.   Tg Below Tg crystalline, brittle Above Tg flexible -Adding plasticizers affects Tg; generally make material have lower Tg/ more  flexible
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PCB-polychlorinated biphenyls phthalates Problems with plastic/polymers-bulky trash Recyclable plastics Biodegradable-corn Incinerate-hot flame (toxic gases, nonreusable Petrochem base-green chem. Plasticizers can be toxic: PCB’s-inert non-reactive (get into nature and stay)
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Air Chemistry 22:09 -90% mass within 30km of surface                                                                                        thermosphere                                                                                          mesosphere                                                                                    stratosphere/ozone                                                                                          trophosphere                       km                                                 temp.
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Air Chemistry 22:09 Air is a mixture of… 78.1% N 2              CO 2  .01% 20.9% O 2              < .001% .9% Ar                 CO, NH 3 , He, H 2 , Ne, H 2 O, Cl 2 , Br 2                              (variable with weather) Nitrogen- essential to life DNA, proteins, bioactive comp. N
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This note was uploaded on 09/27/2011 for the course CHE 10 taught by Professor Toupadakis during the Spring '08 term at UC Davis.

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CHE 10 NOTES (after MT1) - PropertiesofPolymers 22:09...

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