Both these materials are made of carbon and hydrogen formed into monomers and. Ethylene is derived from natural gas and petroleum.

Pdf The Mechanical Properties Of Plastic Evidence Bags Used For Collection And Storage Of Drug Chemicals Relevant To Clandestine Laboratory Investigations

Plastic bags white grocery store bags green garbage bag etc are generally made of polypropylene or polyethylene.

Chemical composition of plastic bags. High density polyethylene hdpe low density polyethylene ldpe or linear low density polyethylene lldpe. Instead of being recycled as new plastic bags many bags are used to create other synthetic materials such as composite lumber. Thermoplastics can be softened by heating reshaped and then hardened by cooling.

The polyethylene used in most plastic shopping bags is either low density resin identification code 4 or more often high density resin identification code 2. The other category of plastics is made up of heterochain polymers. High density polyethylene hdpe low density polyethylene ldpe or linear low density polyethylene lldpe.

Those thick glossy shopping bags from the mall are lldpe while grocery bags are hdpe and garment bags from the dry cleaner are ldpe. Here attached to every other carbon atom is a pendant methyl group ch 3. While shopping bag plastic is recyclable it cannot be remade into an organic state and once created must stay as a synthetic substance for the rest of its life.

The structure of polypropylene can serve as an example. In general plastic bags are the preferred. Typically thermoplastics are shaped into pellets sheets fibers tubes or films before being molded into a variety of products.

These compounds contain atoms such as oxygen nitrogen or sulfur in their backbone chains in addition to carbon. Plastic bags typically are made from one of three basic types. Plastic bags are made from low density polyethylene ldpe a form of thermoplastic.

Traditional plastic bags are usually made from polyethylene which consists of long chains of ethylene monomers. Plastic bags typically are made from one of three basic types. Those thick glossy shopping bags from the mall are lldpe while grocery bags are hdpe and garment bags from the dry cleaner are ldpe.