Synthesis of fluorine contained hyperbranched polysiloxane and their effect on the thermal conductivity of epoxy resins
Funding information: Natural Science Foundation of Shaanxi Province, Grant/Award Number: 2021JM-509; Research Team of Xi'an University, Grant/Award Number: XAWLKYTD018; Science and Technology Program of Xi'an, Grant/Award Number: 21XJZZ0066; Scientific Research Program of Education Department of Shaanxi Province, Grant/Award Number: 21JK0870; Xi'an Association for Science and Technology Young Talent Promotion Project, Grant/Award Number: 095920211335; Youth Innovation Team of Shaanxi Universities
Abstract
To improve the thermostability properties of epoxy (EP) resin, two kinds of novel hyperbranched polysiloxanes containing fluorine were prepared via the sol–gel process and the convenient transesterification process, respectively (F-HBPSi-1 and F-HBPSi-2). These two prepared F-HBPSi were then used as modifier phased to blend with EP to obtain two new series polymer alloys F-HBPSi-1/EP and F-HBPSi-2/EP. The dielectric properties and thermal conductivities of the cured F-HBPSi/EP resins were measured, while their thermal properties were also investigated by thermogravimetry (TG). The results showed that both the thermal conductivities and the thermostability properties of these two F-HBPSi/EP were increased effectively, without further damaging their dielectric properties. Meanwhile, the F-HBPSi-2/EP exhibits better thermal conductivities and thermostability properties than that of F-HBPSi-1/EP. The improved overall performance of F-HBPSi-2/EP can be attributed to the low viscosity and excellent compatibility of F-HBPSi-2, as well as the good synergism between fluorine and silicon.
CONFLICT OF INTEREST
The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.
Open Research
DATA AVAILABILITY STATEMENT
The data that support the findings of this study are available from the corresponding author upon reasonable request.