Natural Rubber is a stretchable and shrinkable polymer. It is found in nature and can also be artificially synthesised. Humans have been using rubber since the earliest times. However, it became an important industrial raw material for several purposes during the nineteenth century. It contains impurities and is reactive to environmental conditions and hydrocarbons. The […]
Rubber is an elastomeric – elastic polymer – material that comes in many forms. It may be sourced from tropical plants in the form of natural rubber, as well as from petroleum and natural gas in the form of synthetic rubber. Rubber is flexible and durable, and therefore, has many uses. Rubber is the primary
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Chemistry, Class 12, IIT JEE, Natural and synthetic polymers, PolymersFibres are thread-like structures that are long, thin, and flexible, and they are made of cellulose. These may be spun into yarns, which can then be used to create fabrics. Fibres can come in a variety of shapes and colours. Natural fibres are distinguished from synthetic fibres in that they are derived from living organisms
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Chemistry, Class 12, IIT JEE, Natural and synthetic polymers, PolymersThe term “man-made” refers to fibres in which either the basic chemical units have been manufactured by chemical synthesis followed by fibre production or the polymers from natural sources have been dissolved and regenerated after passing through a spinneret to form fibres. Artificial fibres are those that are manufactured through chemical synthesis, whereas fibres that
A thermosetting polymer, often known as a thermoset, is a polymer that is formed by permanently hardening (“curing”) a soft solid or viscous liquid prepolymer (resin). Curing causes chemical processes that result in substantial cross-linking between polymer chains, resulting in an insoluble and infusible polymer network. Thermosetting polymer diagram: A monomer, which forms the polymer’s
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Chemistry, Class 12, IIT JEE, Polymers, Types of polymerizationThermoplastic polymers can be divided into two categories: amorphous polymers and crystalline polymers. In order to be more resistant to chemical assault by field, hydraulic oil, and paint remover, the majority of thermoplastics appropriate for use as matrix for high performance composites include some degree of crystallinity in their structural design. Properties of thermoplastic
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Chemistry, Class 12, IIT JEE, Polymers, Types of polymerizationThermoplastics and thermosettings are two types of thermoplastics. Polymers are plastics that go through various manufacturing processes and have a wide range of qualities depending on the constituent materials and manufacturing method. The phrases thermoplastic and thermoset refer to how a material is or can be processed when the temperature is changed. Thermoplastics: Amorphous and
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Chemistry, Class 12, IIT JEE, Polymers, Types of polymerizationWhat Is Phosphinе? Phosphinе, also callеd conjugatеd phosphanе , It is an ionic compound with formula PH3. It is madе up of a cеntral phosphorus atom bonded to thrее hydrogen(H) via singlе bonds. Thеrе are several properties of phosphinе and phosphorus halides that make them sound as a catalyst. Thеrеforе, thе industrial procеssing of phosphinе
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Chemistry, Class 12, IIT JEE, Polymers, Types of polymerizationMonomers are small, individual units of a larger molecule that can chemically link together to form polymers. For example, nucleotides are monomer units that comprise the building blocks of DNA and RNA, that are genetic macromolecules. Polymer [Greek, poly (many) + meros (parts)] is a large molecule whose structure repeats units of simpler chemical compounds.
