聚酰亚胺

The invention relates to soluble fluorine- containing aromatic medlin and its syntheizing method, belonging to macromolecule field.

本发明的可溶性含氟芳香聚酰亚胺及其合成方法属于高分子技术领域。

The solution of fluorine- containing aromatic medlin is greatly increased without influence heat-proof quality, the light-admitting quality of material is improved, the filming property is good and reflecting rate is low.

本发明的含氟芳香聚酰亚胺在不牺牲材料的耐热性的前提下，大大提高溶解性，增加材料的光学透过性，并具有良好的成膜性和较低折射率。

The general formula of said soluble fluorine- containing aromatic medlin is as follows: the substituent group on side phenyl group in diamine monomer Ar includes methyl, trifluoromethyl, two trifluoromethyls or chlorine and trifluoromethyl.

可溶性含氟芳香聚酰亚胺具有如下通式：二胺单体Ar中苯侧基上取代基为甲基、三氟甲基、两个三氟甲基或者氯和三氟甲基。

Multiple transitions, inoludig both physical transitions and chemical transforma-tions, have been investigated for five moldable polyimides of different structures(Table 1)with programmed thermal cycle on a torsional braid apparatus constructed in our laboratory.

2对五种聚酰亚胺经300℃热处理后的热力谱进行了比较，考察化学结构对T_(91)的影响，T_(91)之值随高分子链刚性的增高而增高。

The main production and operation of ultra-thin double-sided tape, strong double-sided tape, high temperature double-sided adhesive tape, conductive double-sided tape, double-sided thermal tape, Teflon tape high temperature, high temperature Masking tape, high temperature polyimide tape, thermal insulation tape , copper foil, aluminum foil conductive adhesive tape, anti-static tape, security tape, waterproof tape, anti-theft tape, non-slip, shock-proof tape, shading tape, reflective tape, protective film, fiber tape, spray adhesive tape, kraft tape, tape Mara, electrical tape, acetate cloth tape, fingerprints, tape, wall tape, seal tape, sealing tape, stickers, all kinds of insulation, high temperature resistant, UL certification shaped materials, sizing, cutting processing.

主要生产经营超薄双面胶带、强力双面胶带、高温双面胶带、导电双面胶带、导热双面胶带、铁氟龙高温胶带、高温美纹胶带、聚酰亚胺高温胶带、导热绝缘胶带，铜箔、铝箔导电胶带、防静电胶带、防伪胶带、防水胶带、防盗胶带、防滑、防震胶带，遮光胶带、反光胶带，保护膜、纤维胶带、喷涂胶带、牛皮胶带、玛拉胶带、电工胶带、醋酸布胶带、指纹胶带、挡墙胶带、封缄胶带、封箱胶带、不干胶、各种绝缘、耐高温、UL认证异形材料、上胶、模切加工。

A statistical optimization method for the design of a fluorinated polyimide wavelength division element for optical communications is proposed. The optimized device is an interleaver element suitable for dividing over 40 wavelengths in the 1550 nm band.

提出并采用统计优化的设计方法解决含氟聚酰亚胺波导波长交叉分离耦合器的偏振态变动的影响。

The influence of degree of sulfonation on the properties of copolymers, such as component, solubility and inherent viscosity were studied.

结果表明DMF，DMAc，NMP等均是该磺化聚酰亚胺的良溶剂，聚合物粘度随着磺酸基含量的增加而降低。

With excellent thermooxidizing resistance and mechanical property, thermosetting polyimides composites have attracted much attention of science researchers.

热固性聚酰亚胺复合材料以其优异的耐热氧化性和机械性能而引起了广大科学工作者的兴趣。

The tensile properties and glass transition temperature were also measured in this experiment.

此外，还对聚酰亚胺薄膜进行了拉伸和动态机械热性能测试。

The invention relates to polyimide molding powder with low melt viscosity and a preparation method, which uses 3,4'- diamino diphenyl ether, 3,3',4,4'-diphenyl ketone dicarboxylic anhydride, 3,3',4,4'-biphenyltetracarboxylic dianhydride, 3,3',4,4'- triphenyl diether dicarboxylic anhydride, 3,3',4,4'- diphenyl ether dicarboxylic anhydride and other monomers to polymerize at 100 to 140 DEG C, to get molding powder with a melt viscosity in the range of 1000Pa.s to 5000Pa.s.

本发明属于一种低熔体粘度聚酰亚胺模塑粉及制备方法，是采用3，4′-二氨基二苯醚同3，3′，4，4′-二苯酮四酸二酐、3，3′，4，4′-联苯四酸二酐、3，3′，4，4′-三苯二醚四酸二酐、3，3′，4，4′-二苯醚四酸二酐等单体在100～140℃聚合，获得熔体粘度在1000Pa.s～5000Pa.s范围内的模塑粉。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。