Question

Se copolimerizeaza 150 moli butadiena cu cianura de vinil (acrilonitril, cianoetena), in raport molar 1:3. Scrie ecuatia reactiei chimice care are loc si calculeaza masa de copolimer obtinuta.

Answer 1

n[ x(CH2=CH-CH=CH2)  +  y(H2C=CH-CN)] ⇒
⇒ {-(CH2-CH=CH-CH2)x - [CH2-CH(CN)]y-}n
x/y = 1/3 
 150/y = 1/3   y = 450 moli ACN 
M = 54 + 3·53 = 213g/mol 
m = 150(54 + 3·53) = 150·213 = 31950g = 31,95kg