Abstract
The study focuses on a Meldrum's acid (MA)-containing polysiloxanes synthesized by means of hydrosilylation reactions and its property of thermal self-crosslinking. In the first section, MA derivatives (MA-VB) that contains two styrene groups has been used to react with hydride-terminated PDMS. The resulting polymers (MA-PDMS) structure was confirmed by FT-IR, 1H-NMR and 29Si-NMR. It has good solubility in organic solvent and can undergo thermal-induced dimerization at 240oC to form a flexible light-permeable film. Next, taken p-Toluenesulfonic acid (PTSA) as a catalyst, MA groups in MA-PDMS polymer chain was reacted with the nucleophilic DOPO molecule. The feasibility of MA groups proceed with nucleophilic addition was verified by FT-IR, 1H-NMR, 29Si-NMR and 31P-NMR. In the second section, a furan-terminated MA-containing siloxanes (MA-DMS-MA) was synthesized via hydrosilylation. The resulting molecule also performs good solubility in organic solvent and can be cured at 240oC to form a flexible film. The product has the potential to further develop its application in self-healing material by Diels-Alder reaction.