#IPACK NAMING OF POLYMERS SERIES#

#IPACK NAMING OF POLYMERS SERIES#

Polymer backbone is the longest series in the polymer chain where the atoms are covalently bonded. ( Examples-: Bakelite, melamine, vulcanized rubber) 4.Based on the backbone of the polymer chains These monomer units are covalently bonded. To form this type of polymers, there should be two or more functional groups in all monomer units. ( Examples-: low-density polyethylene)Ĭrosslinked polymers have three-dimensional polymer networks. The connection between trifunctional and bi-functional monomers mainly contributes to form a branched polymer chain. In these polymers, branching arms start from straight linear chains but these branches are not connected to another chain. ( Examples-: polyethylene, PVC, polypropylene, Teflon) Only bi-functional (only two functional groups are there) monomers contribute to form linear polymer chains. Linear polymers are continuous long chains without any primary interactions between polymer chains. Therefore polymer types can be classified into the main three types of polymer, namely linear polymer, branched polymer, and crosslinked polymer. The bonded pattern of polymers depends on the functional groups in the monomer unit. (Examples-: polyisoprene, polybutadiene, ethylene-propylene rubber, ethylene propylene diene rubber) 3.Based on the structure of the chains And also they can recover to their original shape after removing the forces. The main feature of this type of polymer is, they have high stretchability. (Examples-: Bakelite(phenol-formaldehyde resin), Epoxy resins, Urea-formaldehyde resin, etc )Įlastomers have the weakest Van der Waal’s forces in between the polymer chains. So these polymers cannot reshape after heating. When applying heat they form irreversible crosslinks in between polymer chains. Thermoset polymers have viscous fluid (semi-fluid) behavior. (Examples-: Polystyrene(PS), Polyvinyl chloride(PVC), Polypropylene(PP), etc ) The main feature of these polymer types is, this polymer can easily soften and melt via heating and can reshape by cooling. Thermoplastic polymers have only weak Van der Waal’s forces in between the polymer chains. So there are four main types of polymers according to intermolecular forces. And also there are secondary interactions between polymer chains (intermolecular forces) such as dipole-dipole interactions (hydrogen bonds), Van der Waal’s forces, and polar–dipole interactions. Polymers have a covalent bond as the primary interaction forces in between monomer units. ( Examples-: cellulose, protein, chitin, silk, DNA) 2.Based on molecular force Polymers that exist in nature are called natural polymers. (Examples-: cellulose acetate, cellulose nitrate, chitosan) (Examples-: polyethylene, synthetic fiber, polyvinyl alcohol, nylon)Ĭhemically treated ( modified by humans ) natural polymers are called semi-synthetic polymers. Synthetic polymers are man-made polymer s that are mainly derived from petroleum oil. There are mainly three types of polymers according to their source Polymers can be classified in a lot of ways.

Ipack naming of polymers