摘要
采用分次分步加料—锅煮合成法,以间甲酚和酸化的木质素磺酸钠来改性制取新的酚醛树脂胶粘剂.研究了酸化反应的时间,合成温度及投料比对胶粘剂性能的影响.结果表明:酸化反应2.5h,合成温度100℃,n(甲醛)∶n(苯酚+木质素)=0.75∶1,n(间甲酚)∶n(苯酚+木质素)=0.10∶1,n(木质素)∶n(苯酚+木质素)=0.30∶1时含游离醛质量分数为0.10%,游离酚质量分数为0.25%,黏度0.38Pa·s,粘合强度2.0MPa,最后用红外光谱和紫外光谱对胶粘剂进行结构测试.
M-cresol and acidified sodium ligninosulfonate were used to modify and prepare new phenolic resin adhesive; step-by-step feeding one-pot synthesis method was adopted. Influences of acidizing time, reaction temperature, feed ratio on the properties of the adhesive were studied. The results show that under optimized condition of acidizing time 2. 5 h, temperature 100℃, n（HCHO） ： n（phenol＋lignin） =0. 75： 1 , 5% （mol） of phenol was replaced by M-cresol , lignin to 30%（mol） of phenol replace was replaced by lignin, mass fraction of free formaldehydewas 0. 10%, phenol 0. 25 %, fviscosity 0. 25 Pa · s, the bonding strength was 2 MPa, and the structure of adhesive was ascertained by infrared spectrum and ultraviolet spectrum.
出处
《沈阳大学学报（自然科学版）》
CAS
2014年第1期24-29,共6页
Journal of Shenyang University：Natural Science
基金
教育部大学生创新基金资助项目(201211311001)
关键词
酚醛树脂
胶粘剂
改性
木质素磺酸钠
间甲酚
phenolic resin
adhesive
modification
sodium lignosulfonate
M-cresol
