Recyclable Ordered Necklace-Like Polysiloxane with "Trimeric-DDSQ" Block in the Main Chain

Area of Science:

• Materials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Organosilicon polymers are crucial in various industrial applications.
• Developing advanced materials with enhanced thermal and mechanical properties is an ongoing challenge.
• Recyclability is a key factor for sustainable material development.

Purpose of the Study:

• To synthesize a novel recyclable ordered necklace-like polysiloxane, termed "trimeric-DDSQ"-PDMS (DDDP).
• To investigate the structural and property relationships of the synthesized DDDP.
• To explore the potential applications of DDDP in electronic packaging and material recycling.

Main Methods:

• Fabrication of specific bifunctional organosilicon building blocks: vinyl-terminated double-decker silsesquioxane (DDSQ-Vi), hydrogen-terminated double-decker silsesquioxane (DDSQ-H), and a dumbbell-shaped precursor (DPD).
• Stepwise polymerization utilizing the DPD precursor to achieve ordered necklace-like DDDP structures without additional purification.
• Characterization of the synthesized DDDP for its thermal, optical, mechanical, and recyclability properties.

Main Results:

• Successfully synthesized ordered necklace-like DDDP polysiloxanes through stepwise polymerization of the DPD precursor.
• DDDP exhibits a high proportion of nanocage-shaped double-decker silsesquioxane (DDSQ) within its organosilicon backbone.
• The resulting DDDP demonstrates outstanding thermal stability, optical transparency, favorable mechanical characteristics, and recyclability.

Conclusions:

• The developed DDDP material offers a promising combination of properties due to its unique nanostructure.
• The efficient synthesis method eliminates the need for purification, simplifying the production process.
• DDDP shows significant potential for applications in advanced electronic circuit packaging and contributes to sustainable material recycling efforts.