1. Preparation
The polycondensation reaction is a balanced reaction between the end groups —NH 2 (amine) and —COOH (acid) leading to the formation of —CONH— (amide) groups and water.
The polymer obtained at the end of the reaction, possibly in the presence of a chain limiter, therefore still contains a certain amount of water, residual monomer(s) and oligomers.
Careful drying is necessary before subsequent use, otherwise there is a risk of equilibrium displacement with a reduction in molecular weight.
1.1 Base polymer preparation processes
Melt polyaddition/polycondensation and low-temperature solution polycondensation are still the most commonly used industrial methods....
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Preparation
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Main producers
The names of manufacturing companies, their locations, the types of polyamides manufactured and their brand names are given in tables and .
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