Lab 12: POLYMERS OBJECTIVE: In this lab we experiment and defined the molecular structure of polymers. We analyzed the procedure of cross-linking different types of polymers and observe the changes in the physical properties as a result of this cross-linking. The changes in physical properties of a cross-linked polymer are also studied as the temperature is varied. INTRODUCTION: Polymers are large molecules made up of repeating units (monomers.) These "units" are chemical molecules. There
presence of a suitable polymeric stabiliser that is soluble in the reaction medium. The solvent is a good solvent for the monomer but a poor solvent for the growing polymer chains . Dispersion polymerisation starts as homogeneous with the monomer and initiator both being soluble in the polymerisation medium, but the resulting polymer being insoluble. A suitable polymeric stabiliser should be soluble in the polymerisation medium and could be a homopolymer, block and graft copolymer or a macromonomer
1 A polymer is a large molecule (macromolecule) composed of repeating structural units. These subunits are typically connected by covalent chemical bonds. Although the termpolymer is sometimes taken to refer to plastics, it actually encompasses a large class comprising both natural and synthetic materials with a wide variety of properties. Because of the extraordinary range of properties of polymeric materials,[2] they play an essential and ubiquitous role in everyday life.[3] This role ranges from
Principles in Polymer Processing Industrial Trip Report GROUP 7 Nitin Gautam (09CH3018) Sumit Yadav (09CH3015) S Wardhane (09CH3017) Astha Gupta (09CH3012) 1 Industrial Trip Report RAUNAQ PLASTICS LTD ....................................................................................................................... 4 Products ...................................................................................................................................... 4 Polymer used for manufacturing
ONANUSI ESSAY TOPIC: “Describe and explain how waste polymers are recycled, separated and processed and how chemists minimize environmental damage through production of bioplastics.” The American Chemistry Council (2013) [online] defines a polymer as a useful chemical made up of repeating units which could for a three-dimensional, two-dimensional or one-dimensional network. Alternately, wierdsciencekids.com (n.d) [online] defines a polymer as a macromolecule composed of repeating structural units
POLYMERS – Real – life applications What is Polymer? A polymer is a very large organic molecule made up from many smaller molecules joined together. The small molecules are known as monomers and most polymers are made up of one or two different types of monomer. Or Polymer is a large, complex molecule built from smaller molecules joined together in a repeating pattern. (poly means many, mer means part these words are from greek language. example for polymer are polyethene etc) Most plastics
Polymer The term polymer /ˈpä-lə-mər/ encompasses a very large, broad classes of compounds, both natural and synthetic, with a wide variety of properties. Because of the extraordinary range of properties of polymeric materials,[2] they play an essential and ubiquitous roles in everyday life,[3] from those of familiar synthetic plastics and other materials of day-to-day work and home life, to the natural biopolymers that are fundamental to biological structure and function. A polymer is a chemical
The laboratory experiment examined two types of polymers – silicone and polyvinyl alcohol (PVA). Each type displayed unique properties that were tested utilizing different amounts of key chemical ingredients. Before delving into the specifics of the experimental outcomes it is important to understand polymers and how they serve an integral role in modern society. One common example of a polymer is a silicone polymer which consists of a backbone structure of alternating silicone and oxygen atoms.
Polythene. Polythene is a thermos-softening polymer. Its tangled polymer chains can uncoil and slide past each other, making it a flexible material. So when it is heated it can be shaped. This polymer is also cheap making it ideal for plastic bags. Poly (propene). The properties of poly (propene) are that t has a low density making it ideal for crates and ropes. Also it has a high stiffness. It also is recyclable which also makes it ideal for crates. It also has a good transparency, making it
This essay aims to know what are polymers and also discusses about what is Polyethylene. It does not have information about every single discovery relating to polymers, as that would be nearly impossible. Instead it has information on the major discoveries relating to polymers. Polymers are big molecules made up of repeating units which are bonded covalently among the repeating units. Polymers are made up simple repeating units known as monomers. The word mono means one unit and as the molecule