Synthesis of poly(urea–formaldehyde) encapsulated dibutyltin dilaurate through the self-catalysis of core materials
- First Online:
- 391 Downloads
Polymeric microcapsules (MCs) filled with catalyst can be controlled to release the catalyst to initiate the polymerization reaction. In the present work, poly(urea–formaldehyde) (PUF) MCs filled with DBTDL (PUF/DBTDL MCs) were prepared using urea (U) and formaldehyde (F) as the wall shell materials by in situ polymerization. The U–F resins could easily polymerize in the presence of the core material DBTDL to produce PUF polymers, then they deposited on the surface of the DBTDL droplets, forming PUF/DBTDL MCs. The decomposition temperature (Td) at 5 % weight loss of PUF/DBTDL MCs was about 245 °C. The application of PUF/DBTDL MCs to cyanate ester resins preliminarily showed the reaction control capability of the MCs due to the slow release of DBTDL through the wall shell.
KeywordsMicrocapsule Catalyst Properties Diffusion-controlled reaction Characterization
- 15.Vallance MA, Evans TL, Kelly JM (1988) Composition and method for controlling polymerization rate of cyclic polycarbonate oligomer with encapsulated catalyst. US Patent 4755588Google Scholar
- 25.Christianson Peep, Pehk Tõnis, Siimer Kadri (2006) Structure formation in urea-formaldehyde resin synthesis. Proc Estonian Acad Sci Chem 55:212–225Google Scholar
- 28.Bryant YG (1999) Melt spun fibers containing microencapsulated phase change material. ASME BED 44:225–234Google Scholar