The above results suggest that hair melanin iss complex randompolymer, formed by a very complicated process of oxidation and copolymerization of both sulfur-containing and non-sulfur amino acids.
After the die, it takes some time for polymer molecules to get reoriented to a random manner again, and to recrystallize.
经过模具之后，聚合物分子需要一定的时间进行重新定型回复到随机方向，并再次结晶。
3
The present invention belongs to the field of polymer material technology and is especially one kind of modified random styrene-maleic anhydride copolymer with improved toughness and strength.