The transparency of PE is similar. I bought the PP PE granules of Lanzhou Petrochemical when I was doing my graduation thesis. I feel that their PP granules are round. I hope it will help your question. Yogidan (in-station contact TA)PE melting point 120, PP melting point 170zouliu (in-station contact TA)PP is transparent and hard. Bite it with your teeth and you'll know it. crandy 123 (contact TA in the station) Laugh. You thought it was food, and you bit qd- Lao Wang (contact TA in the station)1. The combustion behavior is different: but it is limited to the identification of pure substances. Polypropylene: easy to burn, and continue to burn after leaving the fire. The flame is yellow at the top and blue at the bottom, with a little black smoke and fragrance. Characteristics of PE: easy to burn, burning after leaving the fire, yellow on the flame and blue on the bottom, melting and dripping when burning, giving off the smell of paraffin burning. 2, let go of boiling, if it is obviously soft, it is PE, if the strength changes little, it is PP; PP is the only universal plastic that can withstand boiling water in family daily life. 3. Test melting point: PP 160 degrees or so; For PE, if it is about 135, it is HDPE；; About 125 degrees, LLDPE；; ; If it is about 1 15 degrees, it is generally LDPE. 4, spherulite culture experiment: on the electric furnace, cut and put the glass slide, after melting, cover the glass slide and turn off the electric furnace; When the temperature reaches room temperature, a crystal is cultivated by polarizing microscope, and PP is easy to grow very big; Physical education class is much harder. In fact, if the temperature of the electric furnace is controlled at 135 degrees, the material will still go up, and it will melt PE, but it will definitely melt PP.5. It depends on the feeling and uses it all. This is a master, and ordinary people can't do it at all. 1, the combustion behavior is different: but it is limited to the identification of pure substances. Polypropylene: easy to burn, and continue to burn after leaving the fire. The flame is yellow at the top and blue at the bottom, with a little black smoke and fragrance. Characteristics of PE: easy to burn, burning after leaving the fire, yellow on the flame, blue on the flame, melting when burning ... The fourth point is that the crystallinity of 585685 (station contact TA) is different. Generally, it is opaque with large crystallinity, such as PEPP with small crystallinity, so it is more transparent. Generally, it is opaque with large crystallinity, such as PEPP with small crystallinity, so it is more transparent.