Total Solid Of Latex

AIM:
To determine the total solid of given latex.

 

APPARATUS:
50ml Erlenmeyer flask,Rubber stopper,2 petridish, Electronic balance, dessicator, oven

 

REQUIREMENTS:
Latex

 

PROCEDURE:

• Take about 20ml of well mixed latex sample in a stoppered erlenmeyer flask.

 

• .Before adding latex, the erlenmeyer flask should be cleaned & dried.
• Wash & dry a petridish of 60mm diameter in an air oven.

• Cool the petridish for a while & take the weight. Note the weight.
• Weigh about 2gm latex from the erlenmeyer flask & pour it into the previously weighed petridish.
  

• Note the weight of latex taken.
• Swirl the petridish gently to ensure that latex cover the bottom of the dish.
• Dry the test portion in an air oven at a temperature of 70 degree celsius for 16 hour.

• Cool in a dessicator & weigh as quickly as possible .

• Repeat the drying operation until the loss in weight is less than 1mg during a period of 30 minutes for temperature between 70-75 degree celsius.
• From the weight of latex taken,weight of petridish alone & the weight of the dried film, the Total Solid Content of latex can be calculated.