The figure below shows TEM micrograph of a rubber toughened polystyrene (PS) orthotic (i.e. rubber particles were added to increase the toughness of the PS. The rubber particles are indicated by arrows. These rubber particles promote the formation of crazes which absorb energy, leading to a material with higher impact resistance. The rubber, which has a Tg of -60°C, can decrease the Tg of the PS (which has a Tg of 100C), however. Assume that the initial Tg of the PS is 80°C. How much would the Tg decrease if 40 weight percent of the rubber was added to PS? b. Sketch dsc curves of the initial PS before and after addition of the rubber.

The figure below shows TEM micrograph of a rubber toughened polystyrene (PS) orthotic (i.e. rubber particles were added to increase the toughness of the PS. The rubber particles are indicated by arrows. These rubber particles promote the formation of crazes which absorb energy, leading to a material with higher impact resistance. The rubber, which has a Tg of -60°C, can decrease the Tg of the PS (which has a Tg of 100C), however. Assume that the initial Tg of the PS is 80°C. How much would the Tg decrease if 40 weight percent of the rubber was added to PS? b. Sketch dsc curves of the initial PS before and after addition of the rubber.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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