Kevlar 섬유의 제조에 필요한 단량체는?
terephthalic acid + 1.4-phenylene diamine
isophthalic acid + 1.4-phenylene diamine
terephthalic acid + 1.3-phenylene diamine
isophthalic acid + 1.3-phenylene diamine
Kevlar 섬유의 제조에 필요한 단량체는?
A. terephthalic acid + 1.4-phenylene diamine
B. isophthalic acid + 1.4-phenylene diamine
C. terephthalic acid + 1.3-phenylene diamine
D. isophthalic acid + 1.3-phenylene diamine