CAJ | 학술논문

试验研究了聚乙烯醇改性脲呋喃树脂的配方和制备工艺.结果表明,添加适量的聚乙烯醇改性剂,甲醛和尿素的最佳物质的量配比为3:1,反应温度控制在75～80℃范围和反应时间为60min时,可制得综合性能较好的低游离甲醛高强度的呋喃树脂.并对改性机理进行了初步探讨.
시험연구료취을희순개성뇨부남수지적배방화제비공예.결과표명,첨가괄량적취을희순개성제,갑철화뇨소적최가물질적량배비위3:1,반응온도공제재75～80℃범위화반응시간위60min시,가제득종합성능교호적저유리갑철고강도적부남수지.병대개성궤리진행료초보탐토.
The formula and preparing process of urea formaldehyde resin modified by polyvinyl alcohol (PVA) were investigated. Results show that the good comprehensive performances of urea formaldehyde resin with low-free formaldehyde and high-tensile strength can be obtained under following condition: adding appropriate amount of PVA modifier, the molar ratio of formaldehyde to urea is 3:1, reaction at 75-80 ℃ and 60 min reaction time. The mechanism of the present reaction was also proposed.