uf urea formaldehyde 中文意思是什麼
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Uf specification for urea - formaldehyde foam systems suitable for thermal insulation of cavity walls with masonry or concrete inner and outer leaves
適用於磚砌或混凝土內外層空心墻保溫的脲甲醛 -
The tea waste powder with different sizes as an additive was used to urea - formaldehyde ( uf ) resin, and the effects of the tea waste powder sizes and amount on the free formaldehyde content of uf resin, the formaldehyde emission, and hood strength of uf resin hooded plywood were studied in this paper
摘要將不同顆粒度的茶葉廢料粉添加到脲醛樹脂膠中，研究了茶葉廢料的顆粒度、加入量等對脲醛樹脂膠黏劑的游離甲醛含量、黏接膠合板的甲醛釋放量及膠合強度的影響。 -
Uf urea formaldehyde
脲醛樹脂 -
The urea - formaldehyde ( uf ) polymer / sio2 composite microspheres were prepared by polymerization - induced colloid aggregation ( pica ) method. the formation mechanism of composite microspheres is attributed to the fact that that urea and formaldehyde firstly undergo acid - catalyzed polymerization to form oligomers, and then the sol particles are adsorbed on the chain of oligomers by wan der walls force and hydrogen bonding. when the oligomers reach the critical chain length, they separate from solution due to phase separation
對復合微球形成機理的研究表明，尿素和甲醛在酸性條件下自身聚合可以形成高分子微球，在sio _ 2酸性溶膠中發生聚和反應時，隨著反應的進行，齊聚物不斷生成， sio _ 2膠體顆粒逐漸吸附在齊聚物分子鏈上，當聚合物鏈達到沉澱臨界鏈長時，由於相分離作用，從前驅物溶液中析出，同時sio _ 2膠體顆粒均勻的分佈在脲醛聚合物網路中，隨之沉澱出來，形成脲醛sio _ 2復合微球。 -
Uf - 80 precondensed urea - formaldehyde resin
尿醛樹脂 -
Plastics - urea - formaldehyde and urea melamine - formaldehyde powder moulding compounds uf - and uf mf - pmcs - part 3 : requirements for selected moulding compounds
塑料.脲醛和脲蜜胺酚醛粉末模塑化合物.第3部分:對所選模塑化合物的要求
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