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 γ-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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- Fall '08
- Polymer, Polymer chemistry, Molecule