Study on the synthesis and application of silicone resin containing phenyl group

Abstract

Silicone resin containing phenyl group was synthesized by hydrolysis-condensation reaction using tetraethoxysilane (TEOS), chlorotrimethylsilane (TMCS) and phenyltriethoxysilane (PhTES). 1 H-NMR and 29 Si-NMR spectroscopy characterizations also confirmed that silicone resin was successfully obtained based on the combination of TEOS, PhTES and TMCS in a crosslinked network structure. Silicone resin has been thoroughly characterized using gel permeation chromatography, thermogravimetric analysis, ultraviolet-visible spectroscopy, contact angle and softening point measurements. A steady increase in the molecular weight, hydrophobic, softening point and maximum degradation temperature of the silicone resin has been observed with the increasing weight percentage of the PhTES crosslink, but transmittance properties decreased. It has been shown that the non-polar component of the higher contact angle of silicone resin can be increased up to 113°b y 3 % PhTES.Silicone resin applied to silicone pressuresensitive adhesives (SPSA) to increase the hydrophobic indicated a decrease in surface energy, leading to improved wettability for polytetrafluoroethylene. The peel strength of SPSA can be increased up to 8 N/2.5 cm by content PhTES 2 % of silicone resin and increased 54 % without PhTES. Graphical Abstract

Study on the Synthesis and Thermal Stability of Silicone Resin Containing Trifluorovinyl Ether Groups

“…As a result, the char yield of them decreased from 73.2% to 32.6% with the increase of the TFVE amount. Compared with other reported silicone resins [ 3 , 15 ], F-SRs showed better thermal stability in air atmosphere.…”

“…Silicone resin is a highly crosslinked polysiloxane with a three-dimensional network, which is usually prepared by hydrolytic polycondensation of polyfunctional organosilanes [ 1 , 2 , 3 ]. They have many excellent properties, such as thermal stability, oxidation resistance, etc [ 4 , 5 ].…”

“…SiO 2 nanoparticles [ 10 ] and Al 2 O 3 [ 11 ] could enhance the stability of silicone resins as fillers. The replacement of the pendant methyl groups by phenyl groups was also a conducive method to improve their thermal stability [ 3 ]. Silphenylene units [ 12 ] and boron atom [ 13 ] were also introduced into the skeleton of silicone resins for their thermal stability improvements.…”

High refractive index adamantane‐based silicone resins for the encapsulation of light‐emitting diodes

“…Because the main chain of silicone resins is Si―O―Si bond, it is not affected by ultraviolet light and ozone. Moreover, high bond energy of Si―O bond is beneficial for thermal and radiation resistance of silicone resins …”

Fabrication of High‐Performance Cationic UV Curable Cycloaliphatic Epoxy/Silicone Hybrid Coatings

“…Silicon‐based polymers, which own low glass transition temperature, low surface energy, high transmittance, and thermal stability, are usually used to improve the hydrophobicity of materials . Polydimethylsiloxane (PDMS) is widely used in modifying epoxy resin coatings .…”