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Polystyrene (PS)
Rigid and non-toxic, with excellent dimensional stability and good chemical resistance to aqueous solution but limited resistance to solvents. This glassclear material is commonly used for disposable
laboratory products. Products made of polystyrene are brittle at ambient temperature and may crack or break if dropped from benchtop height.

Polyolefins are high molecular weight hydrocarbons. They include
low-density, linear low-density and high-density polyethylene, polyallomer, polypropylene and polymethylpentene. All are break-resistant, non-toxic, and non-contaminating. These are the only plastics lighter than water.
They easily withstand exposure to nearly all chemicals at room
temperature for up to 24 hours. Strong oxidizing agents eventually cause
embrittlement. All polyolefins can be damaged by long exposure to
ultraviolet light.

Polyethylene (PE)
The polymerisation of ethylene results in an essentially straight-chained, high molecular weight hydrocarbon. Branching (side chain formation) occurs to some extent and can be controlled. Like other polyolefins, the polyethylenes are chemically inert. Strong
oxidizing agents will eventually cause oxidation and embrittlement. They have no known solvent at room temperature. Aggressive solvents will cause
softening or swelling, but these effects are normally reversible.
Low-density polyethylene (LDPE) has more extensive branching, resulting in a less compact molecular structure. High-density polyethylene (HDPE) has minimal branching, which makes it more rigid and less permeable than LDPE. Linear low-density polyethylene (LLDPE) combines the toughness of low-density polyethylene with the rigidity of high-density polyethylene.

Thermoplastic resins
Are meltable resins with linear structure instead of lattice. During
moulding operations they are transformed without a chemical
modification into objects thus giving a reversible formation process, that can be repeated without changing their thermoplastic properties.
Thermoplastic resins are the materials commonly used in
Anicrin plastic labware production. For this reason we give
below a general description of these resins underlining their structural, mechanical, chemical and physical properties.

Polypropylene (PP)
It is similar to polyethylene, but each unit of the chain has a methyl group attached. It is translucent, autoclavable, and has no known solvent at room temperature. It is slightly more
susceptible to strong oxidizing agents than conventional
polyethylene because of its many branches (methyl groups, in this case).

Polyamidic resins Nylon (PA6)
This is a group of linear polymers with repeated amide
linkages along the backbone. These are produced by an amidation of
diamines with dibasic acids, or polymerisation of amino acids. Nylon is strong and tough. It resists abrasion, fatigue and impact. Nylon
offers excellent chemical resistance with negligible permeation
rates when used with organic solvents. However, it has poor
resistance to strong mineral acids, oxidizing agents and certain salts.

Polycarbonates (PC)
This is a special type of polyester, in which dihydric phenols are
joined through carbonate linkages (O-CO-O). These linkages are subject to
chemical reaction with bases, concentrated acids, etc., and make PC
soluble in various organic solvents. PC is window-clear,
amazingly strong and rigid. It is autoclavable, non-toxic, and the
toughest of all thermoplastics. PC mantains its resistance to
impact in a wide range of temperatures and even under very severe
environmetal conditions.
It withstands both low and high temperature from -50°C up to +130°C and has extremely good optical properties together with a high resistance to sunlight exposure (UV radiation).