A durable press cotton fabric has 6% add-on of DMDHEU. Assume that the molecular weight of anhydro glucose unit (agu) and the reaction efficiency (%) are 162 and 100 respectively
Question 74 (Textile Engineering & Fibre Science)
The nitrogen add-on (%) is approximately
| (A) | 0.88 |
| (B) | 1.18 |
| (C) | 1.38 |
| (D) | 1.58 |
[Show Answer]
Given in the question-
DMDHEU
Add-on %=6%
Molecular weight of anhydro glucose unit (agu)=162
The reaction efficiency=100%
The nitrogen add-on%=?
Molecular structure of DMDHEU
Molecular weight of DMDHEU=178
Molecular weight of nitrogen=28
Nitrogen%=28 x 100/178
Nitrogen% on DMDHEU=15.73
Let the weight of fabric=100 kg
Then, weight of finish=100 x 6%
Weight of finish=6 kg
By unitary rule-
100kg fabric contain………………=15.73% nitrogen
Then, 6kg finish contain…………=15.73 x 6/100
Nitrogen add-on%=0.94 (Ans)