Question 15.2:What are natural and synthetic polymers? Give two examples of each type. 相关知识点: 试题来源: 解析 Natural polymers are polymers that are found in nature.They are formed by plants andanimals. Examples include protein, cellulose, starch, etc.Synthetic polymers are polymers made by...
(and we do not know how much it will cost to destroy them), while wool, cashmere and all other natural fibres will lon 通过赋予特权天然纤维,我们剥削最佳自然可能给没有导致任何多余的污染对地球,看见和“人被制作的”纤维几个世纪更将造成损伤来(和我们不要知道多少将花费毁坏他们),当羊毛时,开士米...
(I) are useful yellow, greenish-yellow, reddish yellow to orange pigments which can be incorporated into viscose, polyamide, polyurethane, polyglycol, terephthalate and polyacrylonitrile spinning solns.; for pigmenting and printing of natural and synthetic resins, rubber, paper, polyolefins, printing ...