Skip to main content

Melting Point of Different Plastics

For my lab, I will be testing the melting points of different plastics.
My Independent Variable will be the different plastics
My Dependent Variable will be the melting point of different plastics
My Control Variable will be the amount of plastic I will be putting into the oven to melt.


To determine the melting point, I have to be observing the plastic for the whole time while it is being heated. I have to be observing very closely because, to determine the melting point I have to see when the plastic starts to melt and when it is completely melted (1). I will be using two plastics two compare each other, I will use Polyethylene terephthalate which is the most produced plastic in the world and Polyethylene, these two plastics are the most common plastics (2). I will be comparing the melting point of each of the plastics and finding out what plastic is more resistant to heat. Polyethylene terephthalate is thermoplastic which means that it reacts to heat in a certain way. The melting point of Polyethylene terephthalate is roughly 260 degrees Celsius (2). Because polyethylene terephthalate is thermoplastic, when melted it turns into a liquid substance and doesn't just burn up. I think that this plastic will therefore be more resistant to heat because it doesn't burn and disintegrate but it turns into a liquid instead (2).






(1)"Determination of Melting Point." Wired Chemist, Claude Yoder,
     www.wiredchemist.com/chemistry/instructional/laboratory-tutorials/
     determination-of-melting-point. Accessed 20 Jan. 2019.


(2) Staff, Creative Mechanisms. "The Eleven Most Important Types of Plastic."
     Creative Mechanisms, 21 July 2016, www.creativemechanisms.com/blog/
     eleven-most-important-plastics. Accessed 20 Jan. 2019.

Comments

Post a Comment

Popular posts from this blog

Isomerization

Research: What are structural Isomers? Online definition:  In chemistry isomerization is the process by which one molecule is transformed into another molecule which has exactly the same atoms, but the atoms have a different arrangement My definition: When the arrangement of a molecule is changed but still has all of the same atoms. (Alkanes) Examples : - Methane - Ethane - Propane  - Butane VIDEO: Constitutional Isomers : Isomers that differ in connectivity Simple hydrocarbons such as; methane, ethane, and propane can not have constitutional isomers because there is no other way to connect them.   There are 2 different butanes that re constitutional isomers. CITATIONS: “What Is Isomerization? - Definition from Petropedia.” Petropedia.com , www.petropedia.com/definition/7019/isomerization. “Isomerization.” Wikipedia , Wikimedia Foundation, 23 Sept. 2018, en.wikipedia.org/wiki/Isomerization. Jones, Maitland. “Isomerism.” ...
Post a Comment
Read more

Combustion reaction by Doris Kra

Doris Kra 05/03/2019 Chemistry Miss. Block                                               What is a combustion reaction A combustion reaction is when a hydrocarbon reacts with oxygen and creates carbon dioxide and water. The formula for a combustion reaction is Hydrocarbon + Oxygen→ Carbon dioxide + Water. A combustion reaction is a common reaction in chemistry it can also be referred to as burning. A combustion reaction is a exothermic reaction because it is releasing heat or energy. (b) Some examples of a Combustion reaction are: Combustion reaction of Methane                                                                                   ...
Post a Comment
Read more

What are covalent bonds and why are they important

                              Covalent bonds A covalent bond also known as molecular bound is when two nonmetals share electrons. The bonding starts forms when the electrostatic attraction of their nuclei are aiming for the same electrons. Atoms will share electrons with other atoms to be stable,  stability is gained by filling their electron shell, and each shell except for the first one needs 8 electrons to have a full shell. For example, Co2, carbon bonds covalently with 2 oxygen to have a full outer shell, oxygen needs 2 electrons to have a full outer shell and carbon, and carbon needs 4 more electrons for a full outer shell, so its going to bond with the oxygen and both elements will be stable. Due to the sharing of electrons, they show physical properties  that include lower melting points and lower  electrical conductivity  compared to ionic compounds .  There are two ...
Post a Comment
Read more