期刊
POLYMER
卷 233, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2021.124214
关键词
Polystyrene vitrimers; Low dielectric loss; Recyclability
资金
- National Natural Science Foundation of China [52173080, 51703179]
- National Key Research and Development Program of China [2019YFA0706801]
- Shaanxi key research and development program [2021GY-218, 6142911200205]
- Fundamental Research Funds for the Central University [xjh012019024]
This study proposes a new method to prepare resin matrix with low dielectric loss, demonstrating excellent properties of COC-PSVM and its quartz glass fiber reinforced COC-PSVM composites, which is beneficial for reducing environmental pollution from e-waste.
With the rapid development of the fifth-generation mobile communication, stringent requirements have been put forward for the dielectric properties of polymer-based copper-clad laminates. However, thermally and mechanically robust materials with low dielectric loss (Dr) are very scarce. Herein, we propose a simple method to prepare cyclic polyolefin (COC)/polystyrene vitrimers (PSVMs) from semi-interpenetrating polymer networks with low Dr. The topological rearrangement of PSVMs caused by the transesterification of nitrogen-coordinating cyclic boronic ester (NCB) linkages under heat helped uniformly disperse the COC in the PSVM. As a result, the COC-PSVM and its quartz glass fiber reinforced COC-PSVM composites exhibited excellent thermal, mechanical, and dielectric properties. Specifically, the dynamic reversibility of the NCB linkages under heat facilitated the complete recovery of the COC-PSVM composites. This study provides a new strategy for the preparation of resin matrix with low Dr for printed circuit boards, which is conductive to reducing the environmental pollution from e-waste.
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