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Need an research paper on plastics testing and failure analysis. Needs to be 5 pages. Please no plagiarism.
Need an research paper on plastics testing and failure analysis. Needs to be 5 pages. Please no plagiarism. Given the considerable differences in plastic properties brought about by such factors as composition, chemical structure, manufacturing conditions, and thermal history, a series of different tests were necessary in order to completely distinguish the samples. .
Plastic can be generally defined as a macromolecular substance formed from linking up of monomers through the use of covalent bonds. Using two or more monomers in the linking process leads to the formation of the copolymer. Thermoplastics and thermosets make up the wider classification of plastics. Thermoplastics are those that exist as single discrete long-chained molecules as opposed to thermosets which exist as cross-linked network structures. The manufacture of plastic products using different processing techniques and materials makes their identification through visual inspection practically impossible.
The lab session aimed at characterizing, testing, and identifying various plastics given that plastic properties are considerably different and are dependent on various factors like composition, thermal history, chemical structure, and manufacturing condition. It conducts a series of tests such as general characteristics: color and texture, transparency, rigidity, and the crystalline nature, Density measurement: direct method and Archimedes, Water absorption, Burning test, Indentation test, Indentation creep test and strength test on six samples of different plastics.
To test for water absorption, each plastic sample was submerged in liquid and the weight measured before and after. The weight of the dry sample and the one saturated with liquid was then recorded and used to calculate the water uptake percentage as follows.
Water uptake (%) = (M2−M1 /M 1 ) ×100
M2 = mass of specimen saturated with liquid
M1 = mass of the dried specimen
Study
Week
NO. Time
(Week)
M2 (gm) Water Uptake (%) = (M2-M1)/M1 × 100
1 2 3 4 5 6 1 2 3 4 5 6
4 0 3.1092 2.5035 3.395 2.1570 5.4519 1.0137 0 0 0 0 0 0
5 1 3.1289 2.5139 3.4122 2.1716 5.5519 1.1741 0.624 0.411 0.486 0.672 1.834 15.833
6 2 3.1619 2.6225 3.4634 2.1858 5.4905 1.2307 1.685 0.799 0.518
8 4 3.1635 2.5481 3.483 2.1982 5.4990 1.2249 1.737 1.785 0.957 1.905 0.864 20.835
9 6 3.2081 2.5742 3.4742 2.229 5.5330 1.2264 3.1808 2.8240 2.311 3.370 1.487 20.
