rdp chemical-How to detect dispersible polymer powder?

1. Film-forming method, take a certain quality of redispersible latex powder, dissolve it in 2 times of water, stir it evenly, let it stand for 2 minutes, stir it again, pour the solution on a flat clean glass, and place the glass on it. Ventilated shade. When it is fully dry, peel it off. Observe the removed polymer film. High transparency and good quality. Then pull moderately, with good elasticity and good quality. The film was then cut into strips, immersed in water, and observed after 1 day, the quality of the film was less dissolved in water. This method is more objective.
2. Ash method, take a certain amount of redispersible latex powder, place it in a metal container after weighing, heat it up to about 500 degrees, after sintering at a high temperature of 500 degrees, cool it to room temperature, and weigh again. Light weight and good quality.
3. Dissolution method, take a certain amount of redispersible latex powder and dissolve it in 5 times its mass of water, stir well and let it stand for 5 minutes before observing. In principle, the less inclusions that settle into the bottom layer, the better the quality of the redispersible polymer powder. This method is simple and easy to do.