甲基丙烷

Under the above optimum conditions, other trimethylolpropane fatty acid esters, such as trimethylolpropane lauric acid ester, trimethylolpropane myristic acid ester, trimethylolpropane capric acid ester and trimethylolpropane octanoic acid ester were synthesized, and their esterification rates were 80.97%, 87.03%, 80.73% and 81.24%, respectively.

在上述的最优条件下，分别合成三羟甲基丙烷月桂酸酯、三羟甲基丙烷豆蔻酸酯、三羟甲基丙烷癸酸酯、三羟甲基丙烷辛酸酯，其酯化率分别为80.97%、87.03%、80.73%和81.24%。

On the base of molecular structure design, the mechanism and technique of the synthesis of 2-(acryloyloxy ethyl trimethyl-ammonium chloride/2-acrylamido-2methylpropane sulfonic acid/acrylamide (AETMAC/AMPS/AM) amphoteric terpolymers by radical co-polymerization in aqueous solution was studied systematically.

依据分子结构设计理论，将2—丙烯酰氧乙基—三甲基氯化铵/2—丙烯酰胺基—2—甲基丙烷磺酸/丙烯酰胺(AETMAC/AMPS/AM)三种单体进行水溶液自由基共聚，合成了AP系列两性离子聚合物。

Nitratomethyl-3-ethyloxetane was synthesized by the process of cyclization, nitation from trimethlolpropane and diethyl carbonate, and the homopolymer of 3-nitratomethyl-3-ethyloxetane was synthesized with 1,4-butanediol as initator and boron trifluoride etherate as an catalyst by cationic ring-opening polymerization.

以三羟-甲基丙烷和碳酸二乙酯为原料经环化、硝化两步反应合成了化合物3-硝酸酯甲基－3-乙基氧丁环；采用1，4-丁二醇为引发剂，三氟化硼乙醚(BF3Et2O)为催化剂，NIMEO发生阳离子开环聚合得到一种端羟硝酸酯均聚醚PNIMEO。

A small molecule core (TMP-SK3)with three terminal carboxyl groups was synthesized successfully by the reaction of 1,1,1-trihydroxymethylpropane with the excessive sebacic acid diacetic anhydride.

以1，1，1-三羟甲基丙烷与过量癸二酸二乙酸酐反应，制得了端羧基的三官能度小分子核三癸二酸三羟甲基丙烷酯（TMP-SK3）。

In this work, trially1 isocyanurate and trimethylolpropane trimethaerylate were used as a polyfunetional monomer of PP/PE blends, and the effects of radiation dosage, the kind and amount of polyfunetional monomer on the morphology and mechanical properties were studied.

本研究中采用三烯丙基异腈脲酸酯和三羟甲基丙烷三甲基丙烯酸酯为PP/PE共混体系的多官能团单体。研究了辐照剂量，多官能团单体种类和多官能团单体用量对共混物形态结构及力学性能的影响。

Linear and star-shaped hydroxy-terminated polys were synthesized by reacting L-lactide with co-initiators such as poly,hydroxyethyl methycrylate,trimethylolpropane,mannitol and sorbierite in the presence of stannous octoate as catalyst.

以辛酸亚锡为催化剂，分别以聚乙二醇、甲基丙烯酸羟乙酯、三羟甲基丙烷、季戊四醇、甘露醇和山梨醇等和L-丙交酯反应，得到末端为羟基的线形和星形聚L-丙交酯。

The comparative investigation of synthesizing the polyhydric alcohols, such as pentaerythritol, pentaglycerine, trimethylolpropane, neopentyl glycol and so on are conducted, these compounds are all based on the reaction of cross-aldol condensation.

对季戊四醇、三羟甲基乙烷、三羟甲基丙烷、新戊二醇等基于交叉羟醛缩合反应的多元醇类化合物的合成进行对比研究。

Flame—retardant resin was prepared by the condensation and polymerization of phosphoric acid, trihydroxy methyl propane and epoxy chloropropane,the resin was then reacted with hexane diacid and diglycol under certain condition ,resulting in polyol containing 1.5% P and 17— 18% polyester polyol, which was foamed with polyisocyanate, water and catalyst by one— step method, producing fire...

通过磷酸、三羟甲基丙烷和环氧氯丙烷的缩合和聚合反应制得阻燃树脂，然后将它与己二酸、一缩二乙二醇在一定条件下反应制得含P1.5%和含Cl17～18%的聚酯多元醇，再将它与多异氰酸酯、水、催化剂等组分采用一步法发泡工艺制得阻燃聚氨酯软泡塑料。

Flame— retardant resin was prepared by the condensation and polymerization of phosphoric acid, trihydroxy methyl propane and epoxy chloropropane,the resin was then reacted with hexane diacid and diglycol under certain condition ,resulting in polyol containing 1.5% P and 17— 18% polyester polyol, which was foamed with polyisocyanate, water and catalyst by one— step method, producing fire—resistant PU soft foam.

通过磷酸、三羟甲基丙烷和环氧氯丙烷的缩合和聚合反应制得阻燃树脂，然后将它与己二酸、一缩二乙二醇在一定条件下反应制得含P1.5%和含Cl17～18%的聚酯多元醇，再将它与多异氰酸酯、水、催化剂等组分采用一步法发泡工艺制得阻燃聚氨酯软泡塑料。

Polyurethane-acrylics hybrid latexes were prepared using isophorone diisocyanate, dimethylol propanoic acid and polypropylene oxides of different molecular weights as main materials for PU component, and butyl acrylate, methyl methacrylate and a crosslinker, trihydroxymethyl propanetriacrylate as main acrylic monomers. Hydroxyethyl acrylate was used as the coupling agent between PU and AC.

以异佛尔酮二异氰酸酯、二羟甲基丙酸和聚丙醚二醇等为聚氨酯原料，丙烯酸丁酯、甲基丙烯酸甲酯、三羟甲基丙烷三丙烯酸酯为丙烯酸酯类单体，丙烯酸羟乙酯为聚氨酯和聚丙烯酸酯间的偶联剂合成了丙烯酸酯改性水性聚氨酯乳液。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。