预聚-固化高强度酚醛树脂封堵剂的合成与影响因素研究

Synthesis and Influencing Factors of Prepolymerization and Curing High Strength Phenolic Resin Plugging Agent

为保证酚醛树脂封堵剂材料的注入性和封堵效果,采用预聚-固化两步法合成酚醛树脂封堵剂,第一步合成酚醛树脂预聚体,第二步酚醛树脂预聚体的固化。首先确定了合成水溶性酚醛树脂预聚体的反应条件:苯酚与甲醛最优摩尔配比为1∶3,以NaOH作催化剂,控制氢氧化钠的量为苯酚加量的10%,确定水溶性树脂预聚体最后阶段最佳的反应温度为90℃。然后,研究了酚醛树脂预聚体封堵剂材料的固化规律。确定了选用氯化铵为固化剂,树脂预聚体质量分数为50%,固化温度为70℃。测试结果表明,合成的酚醛树脂封堵剂材料具有较好的稳定性,在填砂模拟实验中,当树脂预聚体质量分数为50%时,合成的封堵材料在固化后具有较高的强度,可达到32 MPa·m^(-1)。

In order to ensure the injection property and plugging effect of the phenolic resin plugging agent material,a two-step method was used to synthesize the phenolic resin plugging agent,the first step was to synthesize the phenolic resin prepolymer,and the second step was to cure the phenolic resin prepolymer.First,the reaction conditions for the synthesis of the water-soluble phenolic resin prepolymer were determined.The optimal ratio of phenol to formaldehyde was 1∶3.NaOH was selected as the catalyst,and the amount of sodium hydroxide was 10%of the amount of phenol,the optimum reaction temperature for the final stage of the water-soluble resin prepolymer was determined to be 90℃.Then,the curing rules of phenolic resin prepolymer plugging agent materials were studied.It was determined that ammonium chloride was selected as the curing agent,the resin prepolymer mass fraction was 50%,and the curing temperature was 70℃.The test results showed that the synthetic phenolic resin plugging agent material had good stability.In the sand filling simulation experiment,when the resin prepolymer mass fraction was 50%,the strength of the synthesized plugging material reached 32 MPa·m^(-1).