An elephant weighing 1000 kg tries to walk on amorphous polymer A (Tg=100C) at room temperature. If your walking speed is 100-9999 times/s, you will fall into the polymer, and if your walking speed is over 10,000 times/s, you can walk on the polymer. Explain the reason by accurately drawing a graph(compliance, time, log )

Explain with a graph why a lizard falls into polymer B when it stomps 10 times per second, but does not fall in 100 times per second. What happens when the temperature is 50 degrees? Explained with a strain-stress graph when the lizard weighs 100kg

For questions 2, 3. Product A and Product B were manufactured using pistons used to increase the volume of water and parts used in general chairs. Products A and B are made of the same polymer and have the same size and shape.

2. Compare and explain the difference in fracture characteristics between product A and product B that may occur when using the product using a stress-strain graph.

3. If the chair in the picture above was made using thermoplastic resin, please describe its processing process.

4. If a diblock copolymer of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO, Tg=215C) and polystyrene (PS, Tg=100C) was made, the phase morphology would be determined according to the volume fraction of the PS block. ) Predict the change and draw the temperature-shear modulus (temperature-shear modulus) graph.

5. When attempting to manufacture wind turbine blades using a thermosetting resin impregnation processing agent (prepreg), please suggest a processing method that can produce a product with excellent mechanical properties and excellent fracture properties.
 

Transcribed Image Text:

물 제품A- 물 제품 B 물 제품A- 물 제품 B