Characterisation, Testings and Identification of Various Plastics
A plastic is a macromolecular substance and it is made from the linking up of the monomer through covalent bonds. A co-polymer is formed if more than one monomer is involved in the linking-up process. Plastics can be classified as either “thermoplastics” or “thermosets.” The former exists as single discrete long-chain molecules whereas the latter has a cross-linked network structure. The properties of plastics are considerably different and they depend on factors such as chemical structure, composition, thermal history and the manufacturing conditions.
• Characterise the physical properties of six common plastics
• Fabrication of plastics and composites
• Evaluate the hardness, strength and creep properties of various plastics or composites
• Establish the identity of six common plastics
• Teflon, polypropylene, cellulose fibre reinforced epoxy composite
• PMMA, polyvinyl chloride, polyethylene
In this lab you will be provided with six unknown plastic samples numbered from 1 to 6. Your task is to conduct a series of tests described below which will assist you to establish the identity of each of the six plastics.
Test 1: General Characteristics
??Colour and texture
??Transparent or opaque
??Rigid or flexible.
??Amorphous or semicrystalline
Test 2: Density Measurements
(a) Direct method
Density =D=Mass /Volume
(b) Archimedes method
Density =D=(Ml /M2 -M3 )D1
M1 = mass of dried specimen
Di = density of immersion liquid
M2 = mass of specimen, saturated with liquid and suspended in air
M3 = mass of specimen, saturated with and suspended in liquid
Test 3: Water Absorption
Water uptake (%) = (M2-M1 /M 1 ) ×100
M2 = mass of specimen saturated with liquid
M1 = mass of dried specimen
Test 4: Burning Test:
Observe the following characteristics:
• colour of flame
• melting or non-melting
• dripping or non-dripping
• whether non-burning, self-extinguishing, fast or slow burning
Test 5: Indentation Test
Measurement of the resistance of plastics to indentation or hardness. High hardness implies a high resistance to deformation of the plastics.
Test 6: Indentation Creep Test
All plastics are viscoelastic and thus will deform with time, i.e. creep. The creep resistance of a plastic can be measured by evaluating its hardness variation with time.
Test 7: Strength Test
Measurement of the resistance of plastics to breaking or bending. A three-point bend test will be performed to measure the flexural strength of selected plastics.
Describe in detail the methodology used in the characterisation and testing of the various plastic samples. Discuss and comment on the physical meaning and significance of the results obtained for each test. Compare the measured values with the literature values and comment on the accuracy of the values obtained. Establish the identity and chemical structure of the various plastics by completing the table below:
Sample Number Thermoplastics or thermoset Identity of plastic Chemical structure
PLACE THIS ORDER OR A SIMILAR ORDER WITH US TODAY AND GET AN AMAZING DISCOUNT ?
Our Service Charter
Excellent Quality / 100% Plagiarism-FreeWe employ a number of measures to ensure top quality essays. The papers go through a system of quality control prior to delivery. We run plagiarism checks on each paper to ensure that they will be 100% plagiarism-free. So, only clean copies hit customers’ emails. We also never resell the papers completed by our writers. So, once it is checked using a plagiarism checker, the paper will be unique. Speaking of the academic writing standards, we will stick to the assignment brief given by the customer and assign the perfect writer. By saying “the perfect writer” we mean the one having an academic degree in the customer’s study field and positive feedback from other customers.
Free RevisionsWe keep the quality bar of all papers high. But in case you need some extra brilliance to the paper, here’s what to do. First of all, you can choose a top writer. It means that we will assign an expert with a degree in your subject. And secondly, you can rely on our editing services. Our editors will revise your papers, checking whether or not they comply with high standards of academic writing. In addition, editing entails adjusting content if it’s off the topic, adding more sources, refining the language style, and making sure the referencing style is followed.
Confidentiality / 100% No DisclosureWe make sure that clients’ personal data remains confidential and is not exploited for any purposes beyond those related to our services. We only ask you to provide us with the information that is required to produce the paper according to your writing needs. Please note that the payment info is protected as well. Feel free to refer to the support team for more information about our payment methods. The fact that you used our service is kept secret due to the advanced security standards. So, you can be sure that no one will find out that you got a paper from our writing service.
Money Back GuaranteeIf the writer doesn’t address all the questions on your assignment brief or the delivered paper appears to be off the topic, you can ask for a refund. Or, if it is applicable, you can opt in for free revision within 14-30 days, depending on your paper’s length. The revision or refund request should be sent within 14 days after delivery. The customer gets 100% money-back in case they haven't downloaded the paper. All approved refunds will be returned to the customer’s credit card or Bonus Balance in a form of store credit. Take a note that we will send an extra compensation if the customers goes with a store credit.
24/7 Customer SupportWe have a support team working 24/7 ready to give your issue concerning the order their immediate attention. If you have any questions about the ordering process, communication with the writer, payment options, feel free to join live chat. Be sure to get a fast response. They can also give you the exact price quote, taking into account the timing, desired academic level of the paper, and the number of pages.