Plastic classification

Polymer (Polymer) , can call high polymer or gigantic member again (Macromolecules) , also be normally place common says [plastic] (Plastics) or colophony (Resin) , alleged [plastic] , originally it is [make resin] one medium kind, appearance follows natural colophony medium [pine fat] similar, but will form because of carrying chemical power again, and be weighed for [plastic] .

The definition below place of association of experiment of data of basis United States, [Plastic] the data that is a kind to measure organic material to be bases with high polymer, solid state appearance appears when it is machining be over, making and in machining a process, can Jie [activity] (Flow) comes exterior. Via clarifying from this consequently we can get the following understand ︰

One, it is high polymer organic compound

2, it can a variety of model voice exists for example solution of liquid solid colloid

3, it can figuration (Moldable)

4, breed heavy and complicated is formed as a result of different monomer form so different plastic

5, use is extensive commodity occurrence diversification

6, have different quality

7, can use different treatment method (Processing Method)

Polymer is by a lot of young members with lesser and simple structure (Monomer) , jie covalent bond will combine and become. The breed heavy and complicated of polymer, if be changed hotly in order to be opposite,be classified normally, it can be divided for two kinds of big ︰

One, hot solid sex is plastic (what ︰ of Thermoset Plastics) points to is after heating, can make reticulate of molecular structure texture condition, one but structural reticulate is polymeric, even if heats again also won't bate, show so called [be not reversible change] , it is molecular structure produces a change (chemical change) be caused by.

2, thermoplastic plastic (︰ of Thermo Plastics) shows the meeting after heating is fused, after the activity cools to the mould, can shape, what after heating again, can fuse again is plastic, can apply heat reach refrigeration, make its happen [reversible change] () of solid state of → of liquid state ← , it is change of so called physics.

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