Dear Alejandra,

Without knowing the molecular weight or n=number of units in the PVA polymer it will be impossible to calculate the amounts needed of formaldehyde and KOH. In addition please indicate the concentration of formaldehyde.

Rafik

Dear Rafik

The characteristics of the reagents are as follows

*PVA: 99-99,8% hydrolyzed powder. Molecular weight= 77000-79000,

*Formaldehyde: 37 wt% (aqueous solution)

Thanks 

Alejandra

Dear Alejandra,

KOH; MW = 56

Formaldehyde; MW = 30; 30/0.37= 81

PVA; Average MW = 78000; 78000 x 0.6 = 46800

Therefore ratio:

KOH; about 1.2 mg

Formaldehyde; 1.73 mg

PVA; 1 gram.

Hoping this will satisfy you.

Rafik

Dear Rafik

Thanks for the information and your quick aswer

I would like to ask kindly how you calculate those amounts of reagents (KOH and Formaldehyde)

Alejandra