异丁

Synthesis of polyester polyol of sebacic acid series;2. Study on catalyst used to synthesis of polyester polyol ;3. A series of polyester-based thermoplastic polyurethanes elastomer were prepared from polyester polyol ,diphenylmethane-4,4'-diisocyanate and 1,4-butanedio by one-step process.

以聚酯多元醇、4，4'-二苯基甲烷二异氰酸酯和1，4-丁二醇为原料制备了一系列聚酯型热塑性聚氨酯弹性体，对硬段含量、软段种类和软段的分子量等分子结构参数对其力学性能和阻尼性能的影响进行了研究，探索影响规律性，采用原子力显微镜对其软/硬段微相分离结构进行了研究。

Plastic gravure dilution table printing ink solvent is aminomethylbenzoic, propylalcohol, xylene, butyl alcohol, etc.

塑料不凸版外印油不朱的浓缩溶剂是甲苯，异丙醇，二甲苯，丁醇等。

On some resin odoural phacolytic good, better, the price is slightly higher, such as ethanol, isopropanol, butyl alcohol and ethylene glycol.

醇系。对某些树脂溶解性好，气味亦好，价格稍高，如：乙醇、异丙醇、丁醇、乙二醇等。

The results indicated that: the alcoholic substances in Huaguan fruit were higher than those in Golden Delicious and Fuji apple cultivars. The content of alcoholic substances increased along with extending the storage time, and little declined at anaphase. The fruit appeared its special aromatic smell along with increasing of butyl alcohol.

结果表明，华冠果实中醇类物质明显比同期的金冠、富士含量高，随贮藏时间的延长，果实内醇类含量逐步提高、后期稍有下降；果实在贮藏期间随丁醇含量的增加而逐步呈现出特殊的异香味。

The liquefied Japanese cedar was blended with PMDI (poly-4, 4'-diphenylmethane diisocyanate), and adding water as a blowing agent, organosiloxane as a surfactant and dibutyl tin dilaurate as a catalyst to prepare the polyurethane foams. The effects of the kind and dosage of surfactant and the molar ratio of NCO/ for PMDI to liquefied Japanese cedar on the properties of PU foams were investigated.

Don； Japanese cedar进行液化处理，所得液化柳杉进一步与异氰酸酯PMDI混合，并添加水为发泡剂，有机矽氧烷为界面活性剂，二月桂酸二丁锡为催化剂制造聚胺基甲酸酯发泡体，探讨界面活性剂种类、添加量及PMDI与液化柳杉之NCO/莫耳比对所制造PU发泡体性质之影响。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。