考察了醛酚比[即醛酚比=n(甲醛):n(苯酚)=n(F):n(P)]、催化剂(草酸)含量、反应时间和反应温度等对热塑性PF(酚醛树脂)残炭率的影响,并对其合成工艺进行了优化;然后以碳化硼(B_4C)、中间相沥青作为填料,对优化合成的热塑性PF进行改性。结果表明:当n(F):n(P)=0.80:1、w(草酸)=1.5%(相对于苯酚质量而言)、反应温度为95℃和反应时间为3 h时,热塑性PF具有较高的残炭率;B_4C、较高质量比的B_4C/中间相沥青混合填料等,均能有效提高热塑性PF的残炭率。 The effects of the ratio of phenol to phenol [ie, the ratio of phenol to phenol: n (phenol) = n (F): n (P)), the content of catalyst (oxalic acid), the reaction time and the reaction temperature, ) Carbon residue rate, and the synthesis process was optimized. Then, boron carbide (B_4C) and mesophase pitch were used as filler to modify the optimized synthesis of thermoplastic PF. The results showed that when PF (n) = 0.80: 1, w (oxalic acid) = 1.5% (relative to the mass of phenol), the reaction temperature was 95 ℃ and the reaction time was 3 h, Higher residual carbon rate; B_4C, higher mass ratio of B_4C / mesophase pitch mixed filler, etc., can effectively improve the residual carbon rate of thermoplastic PF.