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Chem experiment. Objectives: - To see if there are other solvents possible that can replace thinner (as it is quite harmful) while maintaining the dissolution effect of same strength on expanded polystyrene.

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Introduction

Experiment 3: Possible solvents as substitutes of thinner Objectives: - To see if there are other solvents possible that can replace thinner (as it is quite harmful) while maintaining the dissolution effect of same strength on expanded polystyrene. ( Part 1) - To find out the main constituent component of thinner that is responsible for the dissolution of expanded polystyrene (Part 2) Introduction: Part I: In the previous experiment 1, we have successfully found out that thinner can dissolve chewing gum, which also have the exactly same effect on expanded polystyrene after further investigation. We would like to switch our choice of plastic from chewing gum to expanded polystyrene since a considerable amount of expanded polystyrene are produced every day ...read more.

Middle

The main components of thinner are as follows: Acetone Butan-1-ol Ethyl ethanoate Apparatus : Beakers Stirrer Measuring cylinders Experimental procedure: Step 1: Measure the volume of solvents needed using measuring cylinder Step 2: Pour different kinds of possible solvents into different beakers. Step 3: Use expanded lunch boxes as the source of expanded polystyrene and tear it into smaller pieces so that they are small enough to be put into the beakers. Step 4: Stir the mixture and observe if any reactions occur. P.S: Repeat the same procedure for part 2 (except for Step 1, different main components of thinner should be poured into the beakers instead.) ...read more.

Conclusion

Ethyl ethanoate After putting the plastic in 50mL solution of ethyl ethanoate, foam was observed and the plastic was dissolved completely. It has a very similar reaction as thinner does. Part 2: a) Isoamyl acetate (banana oil) After putting the plastic in 50mL solution of Isoamyl acetate, there was no significant effect that can be observed. b) Artificial esters After putting the plastic in 50mL solution of respective esters, there was also no significant effect that can be observed in all solution of different esters. Conclusion: There are no other solvents possible that can replace thinner so far. Yet, it was found that ethyl ethanoate is the main component of thinner that is responsible for the dissolution of expanded polystyrene. ...read more.

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