end capping是什么意思

网络释义

用法例句

A kind of waterborn polyurethane is synthesized by the reaction of diisocyanate with polyethylene glycol at the presence of end capping reagent;The factors that affect the blocking reaction and prepolymerization reaction were investigated.

以二异氰酸酯、聚醚多元醇为原料,利用二异氰酸酯和聚乙二醇在封端剂的存在下合成了一种水性聚氨酯;探讨了影响预聚反应和封端[反应]应的因素。

The blocking reaction between Phenol and Hexa-diisocyanate with toluene as solvent has been studied.

以苯酚为封端剂,甲苯为溶剂对六亚甲基二异氰酸酯(HDI)进行了封端[反应]应。

The blocking reaction between diethylene Glycol monoethylether and toluene 2,4 diiso cyanate (TDI) has been studied.

对二乙二醇乙醚与 2 ,4 甲苯二异氰酸酯 (TDI)的封端[反应]应进行了研究 ,探讨了温度、催化剂及溶剂等对封端[反应]应的影响。

allyl poly(oxyethylene oxypropylene) monol was firstly synthesized with allyl alcohol as initiator, then sodium methoxide methanol is added to convert the hydroxyl to sodium alcoholate group, methane chloride was added to carry out the methoxyl capping reaction, α allyl poly(oxyethylene oxypropylene) methyl ether was obtained by purifying.

以烯丙醇为起始剂 ,先合成了α 烯丙基齐聚氧化乙烯 氧化丙烯单醇 ;再加入甲醇钠溶液使聚醚的羟基转化为醇钠基团 ;加入一氯甲烷进行封端[反应]应 ,经精制 ,得到α 烯丙基齐聚氧化乙烯 氧化丙烯甲醚。

A series of blocked polyisocyanate adducts has been synthesized, while methyl ethyl ketoxime (MEKO),phenol and ε-caprolactam as blocking agent.

使用甲乙酮肟、己内酰胺及苯酚等不同的封端剂合成了一系列封端型多异氰酸酯加成物。

A series of blocked aliphatic waterborne polyurethane(WPU)emulsions were synthesized with isophoronediisocyanate(IPDI),polyether,dimethylolpropionic acid(DMPA) as materials and NaHSO3 as blocking agent.

以异佛尔酮二异氰酸酯(IPDI)、聚醚多元醇、二羟甲基丙酸(DMPA)为主要原料,采用NaHSO3封端,合成了系列脂肪族水性聚氨酯(WPU)乳液,研究了脂肪族WPU中软段类型、nNCO/nOH、DMPA用量以及NaHSO3用量对乳液及其胶膜相关性能的影响。

The effect of different termination agents on emulsification of the curing agentand,film properties were investigated.

通过对环氧树脂室温固化剂三乙烯四胺进行封端、加成、成盐等一系列改性,制得自乳化水性环氧树脂固化剂;与低相对分子质量的液体环氧树脂混合后,获得了水性环氧树脂涂料。

The difference of application performances from different blocking conditions and different structures was probed.

采用3种聚醚多元醇与2,4-甲苯二异氰酸酯进行加成反应,然后用亚硫酸氢钠进行封端[反应]应,再加入HCl调pH2~3制得芳香族多氨基甲酰磺酸盐(PCS),探讨了具体封端条件和应用性能随其结构不同的差异,用PCS在不同羊毛织物上作防毡缩试验,其抗弯刚度较小,毡缩率较小,该产品与进口产品相比尚好。

The optimum polyol composition,isocyanate group content of the prepolymer and end-capping agent selection were discussed.

以聚醚多元醇和TD I为主要原料,合成预聚体,对预聚体用硅烷进行封端,添加白炭黑、碳酸钙等补强填料,研制了单组分湿气固化密封胶。

Various active agents were used for the end-capping of poly(propylene carbonate)(PPC),and the kinetic of thermal degradation of uncapped and end-capped PPC were investigated.

采用不同封端剂对聚丙撑碳酸酯(PPC)进行了封端,并研究了封端前后PPC的热降解动力学。