Figure 10. — Differential thermal 

 analysis of DMSO xylan and DMSO 

 xylan treated with 5 percent 

 zinc chloride. 



Xylan 



Xylan + 5% ZnCI 







100 200 



Temperature (°C.) 



300 



400 



Figure 11. — Thermogravimetric 

 analysis of DMSO xylan (II) , 

 and base xylan (I) , treated 

 with 9 percent sodium hydroxide. 



200 300 

 Temperature (°C.) 



500 



18 



