聚四氟乙烯

The molecular sieve is prepared in the steps: at the room temperature, hexadecyl trimethyl ammonium bromide is mixed and dissolved with the sodium hydroxide, and is added with TEOS in dropping way, and simultaneously added with Me metal salt water solution and lanthanum nitrate solution in dropping way; the pH value of the mixed solution is adjusted by acetic acid to be 10 to 11, and is mixed for 1 to 2 hours after being stabilized; the sol is moved into a polyfluortetraethylene bottle to be heated and crystallized for 2 days in the oven at the temperature of 100 DEG C; after filtering, washing and drying for nights, and being calcined in a muffle at the temperature of 550 DEG C for 3 to 7 hours, the dual-metal-atom improved MCM-41 mesoporous molecular sieve is obtained.

该分子筛的制备为室温下，将十六烷基三甲基溴化铵和氢氧化钠混合溶解，搅拌并滴加入TEOS，同时滴加入Me金属盐水溶液和硝酸镧溶液并搅拌，用乙酸调节pH值至10～11，稳定后搅拌1～2小时，溶胶转入聚四氟乙烯瓶中在100℃下烘箱水热晶化2天，经过滤、洗涤、干燥过夜，马弗炉550℃焙烧3-7h，得双金属原子改性MCM-41介孔分子筛产品。

The compensator is made up with compensate pipeline, two flanges fixedly connected with the compensate pipeline and a diversion knot fixedly connected with one of the two flanges and installed in compensate pipeline. Tube wall's structure is as follows: outer layer is fibre enhanced elastomer composite material whose concrete form is fibre cloth enhanced latex mixedly weaved by non-asbestos fibre and steel wire; the second layer is anti corrosive coating wax cloth made by polytetrafluoroethylene; the third layer is thermal protective coating made by glass wool or refractory wool in block shape between two layers of glass fibre clothes; inter layer is dust layer made by glass fibre dilatants voile fabric braided after surface treatment.

本发明的一种多层结构纤维增强弹性体管道补偿器，由补偿管段、与补偿管段两端固定连接的两个法兰、以及一端与两个法兰之一固定连接而安装在补偿管段内的导流套构成，补偿管段的管壁结构为：外层为纤维增强弹性体复合材料，该材料的具体形式是非石棉纤维与钢丝混合编织的纤维布增强橡胶；第二层是由聚四氟乙烯漆布构成的防腐层；第三层是由两层玻璃纤维布之间包覆的块状玻璃棉或陶瓷棉构成的隔热层；内层是经表面处理的玻璃纤维膨体纱编织布构成的防尘层。

The advantages of Fluorphlogopite Mica are: good penetrativity of light and wave; long time operation at the temperature up to 1100°C; anticorruption of strong acid and alkali and nocuous gases; almost no loss in high frequency medium; 2000-time-smaller vacuum deflation at high temperature than inartificial mica while 1000-time-higher body resistance than inartificial mica.

氟晶云母优于其他云母的关键点在于：优秀的光、波透过率；可长期在高达1100℃的高温环境下工作；抗强酸、强碱及有害气体的腐蚀；在高频介质环境下基本没有损耗；高温真空放气量比天然云母小2000倍，体电阻率比天然云母高1000倍。氟晶云母是替代天然云母、聚四氟乙烯、石英玻璃等低性能材料的新型耐高温、高频、绝缘材料。

1DF-1 are oilless lubricating materials. Their surface layer is modified tefolon plastics. They may be operated in non-lubrication applications.

DF-1复合材料的表面摩擦层为改性聚四氟乙烯，是一种无油润滑材料，可在干摩擦条件下进行工作，而在有油润滑的条件下进行工作，其寿命会成倍甚至几十倍地提高。

UHMW-PE grating factor than unaccounted engineering plastics's small,can and polytetra-fluoro-ethylene each each other setoff setoff,be true from oleiferous substance.

UHMW-PE 的磨擦系数双其它工程塑料的小，可与聚四氟乙烯相媲美，是理想的自润滑材料。

UHMW-PE grating factory than unaccounted engineering plastice's small ,can and polytetra-fluoro-ethylene each other setoff ,be true from,oleiferous substance .

UHMW-PE的摩擦系数比其他工程塑料的小，可与聚四氟乙烯相媲美，是理想的自润滑材料。

Attempts to use teflon produced joints that caused osteolysis and wore out within two years.

尝试使用聚四氟乙烯生产关节，导致骨溶解和穿了两年之内。

MPH plastic magnetic pump complies with JB/T7742-1995Standard for Small Magnetic Transmission Centrifugal Pump. Its flow-through parts adopt PPS with corrosion resistance to most acid, alkali and salt (except oxidable acid like strong sul-furic acid, nitric acid and aqua regia). Its performance is close to the chemical performance of F4, which can resist to most organic solvents under 100℃, especially to the mixture of gas and carbinol. Thus it is an ideal pump for acid and alkali industries.

MPH型塑料磁力泵符合JB/T 7742-1995《小型磁力传动离心泵》标准，过流部件采用聚苯硫醚，不受大多数酸、碱、盐的侵蚀(除氧化性酸如浓硫酸、硝酸和王水等)，其性能接近于聚四氟乙烯的化学性能，在100℃以下能耐大多数有机溶剂，特别能耐汽油和甲醇的混和液，是酸碱工业中的理想用泵。

Key words: expanded polytetrafluoroethylene; phalloplasty; glans plasty

膨体聚四氟乙烯；阴茎再造术；龟头成形术

Trace Hg in aqueous solution was preconcentrated by on-line formation of mercury diethyldithiocarbamate complex and adsorption of the resulting neutral complex on the inner walls of a PTFE knotted reactor.

天然水样中痕量的Hg通过FI在线形成中性的汞-二乙基二氨基甲酸络合物并吸附在聚四氟乙烯管编制的KR的内壁上实现预富集。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。