TY - JOUR
AU - Lu, Zaijun
AB - To further increase the intrinsic thermal conductivity (TC) of polybenzoxazine, a series of benzoxazine-epoxy thermosets (s-PBEI) were obtained through the sequential curing of a smectic phase epoxy monomer (s-EP) and a bifunctional benzoxazine monomer (BZ) in the presence of imidazole. The results show that s-PBEI exhibits a smectic mesophase. The formation mechanism of the smectic phase is reaction-induced phase separation caused by the preferential curing of s-EP. Owing to the increment of the liquid crystalline structure content, the TC of s-PBEI increases with increasing s-EP content. The TC of s-PBEI55 containing equal weight of BZ and s-EP reaches 0.30 W m−1 K−1, which is higher than that of n-PBEI55, a benzoxazine-epoxy thermoset with nematic phase structures. Additionally, the TC, glass transition temperature, and 10% weight loss temperature of s-PBEI64 containing 60 wt% BZ and 40 wt% s-EP are 0.28 W m−1 K−1, 216°C, and 334°C, respectively, indicating its potential applications in electronic packaging, LED lighting, and other fields requiring a high TC resin matrix.
TI - Benzoxazine-epoxy thermosets with smectic phase structures for high thermal conductive materials
JO - Liquid Crystals
DO - 10.1080/02678292.2019.1595755
DA - 2019-09-02
UR - https://www.deepdyve.com/lp/taylor-francis/benzoxazine-epoxy-thermosets-with-smectic-phase-structures-for-high-WoNAyY5ras
SP - 1686
EP - 1695
VL - 46
IS - 11
DP - DeepDyve
ER -