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When ATRP of styrene was investigated with 1-phenylethyl bromide/benzyl a,a-dibromide mixture as initiator, the GPC chromatogram shows two elution peaks and the molecular weighs of the peaks are approximately in a 2/1 ratio. It suggests that benzyl dibromide is a difunctional initiator of ATRP of styrene. The analysis of end group using 1H-NMR also proves the result above.

采用1-苯基溴乙烷/α,α-二溴化苄混合引发剂进行苯乙烯的ATRP反应时,所得聚苯乙烯的GPC谱图为双峰,分子量相差一倍,初步证明了α,α-二溴化苄引发苯乙烯ATRP反应时是双官能引发剂,并用~1H-NMR对聚合物结构进行分析,进一步证明了α,α-二溴化苄引发苯乙烯ATRP时是双端同时增长的。

Bromoundecanoic acid was synthesized with 10-undecanoic acid and hydrobromic acid as raw materials.

以10-十一烯酸和溴化氢为原料合成11-溴代十一酸,考察了引发剂、溶剂、反应温度、后处理方法、熟化时间等因素对反应和产品的影响。

Bromoundecanoic acid was synthesized with 10-undecanoic acid and hydrobromic acid as raw materials. The effects of initiating agent, solvent, reaction temperature, the ways of disposal, ripening time etc. on the reaction and product were investigated.

以10-十一烯酸和溴化氢为原料合成11-溴代十一酸,考察了引发剂、溶剂、反应温度、后处理方法、熟化时间等因素对反应和产品的影响。

The present invention uses isocyanuric acid as main raw material, and adopts the following main steps: adding alkali to make solvation, chlorization, bromation, secondary chlorization, filtering and drying to prepare bromochloro-isocyanuric acid.

本发明公开了一种溴氯异氰尿酸消毒灭菌剂的制备方法。该方法以异氰尿酸为主要原料,通过加碱溶解、氯化、溴化、再氯化、过滤、干燥主要步骤制备溴氯异氰尿酸。

In solid phase process, the polyiodides, which include triiodide, pentaiodide, heptaiodide, nonaiodide and undecaiodide tetra-n-butyl ammonium iodide, tetrabutyl ammonium bromide and tetramethyl ammonium iodide poly-compounds, were synthesized by the low-heat solid phase reaction between iodine and tetra-n-butyl ammonium iodide, tetrabutyl ammonium bromide or tetramethyl ammonium iodide; In complexation process, solution polyiodides were synthesized by complexing action of different agents; In resinifying process, triiodide, pentaiodide, heptaiodide resinic polyiodides were synthesized by ion-exchange when the strong basicity styrene anion exchange resin, potassium iodide and iodine were used as raw materials.

固相法是用正四丁基碘化铵、四丁基溴化铵或四甲基碘化铵分别与碘作用,通过低热固相反应,合成出碘三、碘五、碘七、碘九和碘十一形式的正四丁基碘化铵、四丁基溴化铵或四甲基碘化铵的系列高聚碘化合物;在络合法合成溶液高聚碘的实验中,选用几种络合剂通过络合作用首次合成了溶液高聚碘;树脂法合成高聚碘的实验是采用强碱性苯乙烯系阴离子交换树脂、碘化钾和碘为原料,通过离子交换,合成了碘三、碘五和碘七形式的树脂高聚碘。

Seven of them have not been reported.Their structures were confirmed by IR,~1HNMR,MS,and element analysis. 4.Meanwhile,the green methylation procedure of imides was developed by using dimethyl carbonate as methylation reagent.A series of imides,for example,phthalimide,3,4-dibromo-maleimide and succincide were used for substrates.The effects of DABCO(1,4-diazabicyclo [2.2.2]octane)and DBU(1,8-diazabicyclo[5.4.0]undec-7-ene)as a catalyst in this kind of reactions were investigated.2-Bromo-3-(1-methylindolyl-3-yl)-1-methyl-1H-pyrrole-2,5-dione was prepared by using dimethyl carbonate,which further expanded the use of dimethyl carbonate,as a green agent in organic synthesis.

在以硫酸二甲酯为甲基化试剂对3,4-二溴马来酰亚胺进行N-甲基化反应合成3,4-二溴-N-甲基马来酰亚胺的同时,以碳酸二甲酯为甲基化试剂,对3,4-二溴马来酰亚胺、邻苯二甲酰亚胺、琥珀酰亚胺等酰亚胺类化合物的N-甲基化反应进行了研究;考察了1,4-二氮杂双环[2.2.2]辛烷,1,8-二氮杂双环[5.4.0]十一碳-7-烯、碳酸钾和四丁基溴化铵等作为催化剂对碳酸二甲酯N-甲基化反应的反应时间和收率等的影响,并应用碳酸二甲酯为甲基化试剂,合成了N-甲基-3-溴-4-(1-甲基-吲哚-3)-马来酰亚胺。

It was found that tribromide quaternary ammonium salt was an excellent bromide reagent, which was easy to handle and had low toxicity. The reaction can process rapidly and has high bromide rate.

研究结果表明,三溴季铵盐是一种性能优良的固体溴化剂,操作方便,对人体的危害性小,反应速度快,溴化率高。

The bromo-polyethylenegylcol-monomethacrylate was synthesized by two steps. Firstly, methylacrylic acid was esterified with polyethylene glycol (PEG, M=200, 400) to give polyethyleneglycol-monomethacrylate Secondly, treatment of PEG-MA with phosphorus tribromide gave the aim product.

以聚乙二醉(M分别为200,400)和甲基丙烯酸进行单酯化反应,所得单酯再与三溴化磷进行溴化反应合成了一种新的两端具有功能团的不饱和溴化物,即溴代甲基丙烯酸单聚乙二醇酯。

In the process of bromotion of ester, it adopted high selective brominating agent , the yield exceeded 90% and the purity was above 95%.

在芳醚的溴化反应中,首次采用了高选择性的溴化剂,使溴化一步的收率超过90%,含量均在95%以上,具有很好的经济效益和应用前景。

When ATRP of styrene was investigated with 1-phenylethyl bromide/benzyl a,a-dibromide mixture as initiator, the GPC chromatogram shows two elution peaks and the molecular weighs of the peaks are approximately in a 2/1 ratio. It suggests that benzyl dibromide is a difunctional initiator of ATRP of styrene. The analysis of end group using 1H-NMR also proves the result above.

采用1-苯基溴乙烷/α,α-二溴化苄混合引发剂进行苯乙烯的ATRP反应时,所得聚苯乙烯的GPC谱图为双峰,分子量相差一倍,初步证明了α,α-二溴化(来源:ABf399C论文网www.abclunwen.com)苄引发苯乙烯ATRP反应时是双官能引发剂,并用~1H-NMR对聚合物结构进行分析,进一步证明了α,α-二溴化苄引发苯乙烯ATRP时是双端同时增长的。

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And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时,论述了一体化管理体系构建中的几个主要问题,包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。

If you're huffing and puffing at any point during the run, slow down and make sure you can take deep breathes.

如果你任何时候在跑步过程中气喘如牛,降低速度并且确保你能够深呼吸。