Table 2.

Overview of recycling methods for thermoset polymers.

Recycling Methods	Short Description	Advantageous (+)/ Disadvantageous (−)	Status of the Technology	References
Tertiary recycling, i.e., chemical recycling through chemicals and/or energy	chemical recycling consisting of destroying the three-dimensional crosslinked structure	(+) materials recovery (−) negative environmental impacts due to use of chemicals, solvents, etc.	under investigations; limited industrially applicable practice	[75,76,77,78,79,80,81,82,83,84,85,86,87,88,89]
Quaternary recycling, i.e., energy recovery	incineration of three-dimensional crosslinked plastic to recovery of their embedded energy	(+) energy recovery, which is preferable to landfilling (−) gas emissions must be controlled to minimize their negative environmental impacts	applicable	[75]