To achieve high-performance thermosets, three diallyl-containing main-chain type benzoxazine polymers, (MCBP) were prepared from Mannich condensation of 2,2′-diallyl bisphenol A, paraformaldehyde, and three diamines: 4,4′-diaminodiphenylmethane (DDM), 4,4′-oxydianiline (ODA), and 2,2′-bis(4-(4-aminophenoxy)phenyl)propane (BAPP), respectively. These MCBPs can be cured and general a phenolic hydroxyl type benzoxazine thermosets even though no free ortho and free para positions to the oxygen of oxazine in their structures. After thermally curing, the resulting thermosets display much higher T_g than the thermosets of 2,2′-diallyl bisphenol A/aniline-based, 2-allyl phenol/DDM-based, and 2-allylphenol/ODA-based benzoxazine, demonstrating the advantage of MCBP on thermal properties over monomer type benzoxazines. The refractive index of the thermosets is higher than 1.689 at 589 nm, which is relatively high compared with other polymers. These results demonstrate the advantage of diallyl-containing MCBPs on thermal properties and refractive index over allyl-containing monomer type benzoxazines.

为了实现高性能的热固性，由2,2'-二烯丙基双酚A，多聚甲醛和三种二胺：4,4'-二氨基二苯甲烷（DDM）的曼尼希缩合制备了三种含二烯丙基的主链型苯并恶嗪聚合物（MCBP）。 ），4,4'-氧化二苯胺（ODA）和2,2'-双（4-（4-氨基苯氧基）苯基）丙烷（BAPP）。这些MCBP可以被固化，并且通常具有酚羟基型苯并恶嗪热固性，即使在其结构中与恶嗪的氧没有游离邻位和游离对位。热固化后，所得的热固性塑料显示出更高的T _g比2,2'-二烯丙基双酚A /苯胺基，2-烯丙基苯酚/ DDM基和2-烯丙基苯酚/ ODA基苯并恶嗪的热固性更强，证明了MCBP在热性能方面优于单体型苯并恶嗪。热固性树脂在589 nm处的折射率高于1.689，与其他聚合物相比，该折射率相对较高。这些结果证明，与含烯丙基的单体型苯并恶嗪相比，含二烯丙基的MCBP在热性能和折射率上的优势。