1. The effect of temperature on polyurethane stretching intensity and elastic modulus
As the temperature rises, the stretching strength and elastic modulus decreases linearly. The reason is that as the temperature increases, the activity of the polymer chain segment increases, and gradually changes from glassma to high elastic state and adhesive.
2. The effect of temperature on polyurethane products
With the rise of temperature, the elongation of the fracture and extension of the brittle fracture of polyurethane products gradually increased, and the elongation rate of organic glass at 60 ° C reached 5.6. When the temperature exceeds a certain amount, polyurethane products begin to soften, and yield damage occurs during stretching. The relationship between the elongation and temperature of polyurethane products and temperature.
3. The impact of temperature on polyurethane product impact intensity
Temperature has a similar effect on the impact performance of polyurethane products. With the rise of temperature, the movement of polyurethane molecular segments has increased, and macroex, flexibility and impact intensity are increased.
4. The effect of temperature and other factors on the hardness of polyurethane products
The hardness of polyurethane products decreases with the rise of temperature. In addition, the greater the load value used in the measurement hardness, the lower the measured hardness value. Within a certain range, the larger the thickness of polyurethane products, the higher the measurement value; however, when the thickness increases to a certain degree, the measured hardness does not increase significantly.
5. The effect of temperature on polyurethane products
Temperature also has a certain impact on the Polytic pine ratio of polyurethane products. The higher the temperature, the larger the pine ratio.
