Question: PLS HELP ASAP ! TY Understanding the mechanisms by which polymers elastically and plastically deform allows one to alter and control their moduli of elasticity
PLS HELP ASAP ! TY 

Understanding the mechanisms by which polymers elastically and plastically deform allows one to alter and control their moduli of elasticity and strengths. Generally, there are three characteristics of stress-strain behaviours are observed for polymeric materials. Memahami mekanisme yang mengubah bentuk polimer secara elastik dan plastik membolehkan seseorang mengubah dan mengawal moduli keanjalan dan kekuatannya. Secara amnya, terdapat tiga jenis tingkah laku tegasan-terikan yang diperhatikan untuk bahan polimer. a. Draw a schematic plot of the three characteristics stress-strain behaviours observed for polymeric materials. Explain each of their characteristics. (10 marks) Lukiskan plot skematik bagi tiga ciri tingkah laku tegasan-terikan yang diperhatikan untuk bahan polimer. Terangkan setiap ciri tersebut. (10 markah) b. . Melting and glass transition temperatures are important parameters in various polymer applications. List four (4) characteristics or structural components of a polymer that affect both its melting and glass-transition temperatures. (4 marks) Suhu lebur dan suhu peralihan kaca adalah parameter penting dalam pelbagai aplikasi polimer. Senaraikan empat (4) ciri atau komponen struktur polimer yang mempengaruhi kedua-dua suhu lebur dan suhu peralihan kaca. (4 markah) C. c. Differential Scanning Calorimetry (DSC) techniques measure glass transition temperature (T9). The Ta parameter can also be determined by Differential Thermal Analysis (DTA). Explain the difference between DSC and a DTA instruments. (6 marks) Teknik kalorimeter imbasan pembezaan (DSC) mengukur suhu peralihan kaca (To). Parameter Ta juga boleh ditentukan dengan menggunakan Analisis Pembezaan Termal (DTA). Jelaskan perbezaaan di antara peralatan DSC dan DTA. (6 markah) d. The Plastic Container Coding System consist of a series of symbols imprinted at the bottom of plastic containers. Each symbol consists of number at the centre of tree- arrow triangle, with identifying letters. Give the polymer name that using the following coding numbers. (5 marks) Sistem Kod Bekas Plastik mengandungi simbol siri yang dicetak pada bahagian bawah bekas plastik. Setiap simbol mengandungi nombor di tengah anak panah segitiga, dengan pengenalan huruf. Berikan nama polimer yang menggunakan kod nombor berikut. (5 markah) i. ii. iii. 1 2 3 4 5 iv. v. LO e. . State one of the latest environmental issues associated with a polymer product. Briefly, explain the type of the polymer and its disadvantages. (6 marks)
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