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8. When a polymer is stressed in tension, the ( A ) with the stretch rate increases¡£ (A) ¦ÒB increases and ¦ÅB decrease; (B) ¦ÒB decrease and ¦ÅB increase; (C) ¦ÒB increase and ¦ÅB increase; (D) ¦ÒB decrease and ¦ÅB decrease
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(D) SBS is obviously two-phase structure, as the continuous phase PB, PS of the dispersed phase.
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3. For polymer blends with a UCST diagram, phase separation will take place when
temperature is below the UCST at any composition. ( ? )
4. For a polymer, the viscosity-average molecular mass is larger than its weight-average
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6. The Maxwell element is good at predicting stress relaxation behavior of linear polymer.
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