Polyformaldehyde depolymerization
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Using polyformaldehyde instead of a 37% formalin solution in the reaction – is it sufficient to simply dissolve the polyformaldehyde in the solvent, or is it necessary to heat it to break down the formalin into its monomers? What is the difference between the two? Those who know please explain
After heating, the monomer can be decomposed； Using dissolution does not mean depolymerization.
Is there anyone else who knows the same solution?
It seems that in this reaction, the yield of direct dissolution is not high, and poor control over depolymerization also results in a low yield
This is also a problem I encountered in the experiment; I haven’t been able to think of any good solutions. If you have any experience, please share it with me...
The melting point of polyformaldehyde is between 120–170°C. What effect does the degree of polymerization have on the melting point?
How is polyformaldehyde melted at atmospheric pressure?
Polymerized formaldehyde can be mixed with an alkaline solution and hot water, the temperature being maintained above 120°C, with stirring or liquid circulation, and the pH kept at 7. The depolymerization of the polymeric material in the absorption tower of this device is carried out using this untreated method; due to operational constraints, it is not possible to conduct operations on a large scale with solid formaldehyde blocks, but depolymerization can still be achieved using smaller samples for experiments. Everyone can give it a try.