Perennial chrysanthemum is a perennial herb. It is cultivated once a year, and its plant height is 60 cm. The leaf base has a crack, white jade, chrysanthemum flavor, long flowering period, and flowering branch. Each plant can open nearly 100 flowers. Cultivation points: optimum temperature for germination: 15-23°C, optimum temperature for growth: 20-35°C, planting requirements: seeds can be sown on moist culture soil, covered with a thin film, and emerged in 7-10 days. Transplantation, with a spacing of 20 cm, does not require much soil, and sandy soil or loam is preferred. Apply organic fertilizer before planting. Drainage needs to be good and the light should be sufficient. Cut flowers can be taken when the first flower is completely open.
Polypropyl carbonate is soluble in polar solvents such as ketones, ethyl acetate, dichloromethanes and chlorohydrocarbons, and insoluble in alcohols, water and aliphatic hydrocarbons. It also forms a stable emulsion in the water. PPC allows gases like oxygen to diffuse through it. The glass temperature (Tg) is between 25 and 45℃, and PPC adhesives are amorphous. The glass temperature of PPC is slightly higher than that of polyethyl carbonate (PEC).
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