2134/35601
Paul R. Russell
Paul R.
Russell
The crystal structures and thermal decompositions of trihydrazinotriazine and biurea
Loughborough University
2018
untagged
Chemical Sciences not elsewhere classified
2018-10-30 15:21:54
Thesis
https://repository.lboro.ac.uk/articles/thesis/The_crystal_structures_and_thermal_decompositions_of_trihydrazinotriazine_and_biurea/9397586
Trihydrazinotriazine (THT) and biurea are both used industrially
as blowing agents for expanding certain types of polymers. The term
‘blowing agent’ is applied to any substance which can produce pores or
cells in a polymeric material. There are two classes of blowing agent,
physical and chemical. Physical blowing agents depend on a change of
state of the substance to produce the cells e.g. the expansion of a
compressed gas or evaporation of a liquid. Chemical. blowing agents
depend on the evolution of gases by thermal decomposition to produce the.
cells. It is to this latter class that THT and biurea belong. [Continues.]