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Unformatted text preview: a.) Very rapid cooling, 100 K/sec. b.) Very slow cooling, 10-2 K/sec What would be the effect (increase, decrease, no change) on Tg for sample due to: c.) Crosslinking the PVC with -radiation? d.) Copolymerization of PVC with a small amount of styrene? e.) Decreasing the molecular weight of the PVC from 150,000 to 2500 g/mol? f.) Applying a pressure of 2000 MPa? g.) How could you decrease the Tg of PVC to below room temperature without changing the polymer molecules or applying pressure?...
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This note was uploaded on 12/09/2011 for the course CHEM ENG 178 taught by Professor Segalman during the Fall '08 term at University of California, Berkeley.
- Fall '08