偏光显微镜

Di(3,4-dimethyl)benzylidene xylitol as synthesized in the lab from 3,4-dimethyl benzaldehyde and xylitol, and a series of polypropylene samples were prepared based on the amount of the nucleating agent, DMDBX used.

以3，4-二甲基苯甲醛和木糖醇为原料合成1，3-2，4-二（3，4-二甲基）亚苄基木糖醇，将DMDBX作为成核剂使用溶液沉淀法制备DMDBX质量分数分别为0、0.1%、0.3%、0.5%、0.7%、0.9%的聚丙烯样品，采用红外光谱仪、差示扫描量热仪、X射线衍射仪和偏光显微镜等方法，研究了DMDBX对PP结晶结构和结晶性能的影响。

Polarizing microscopy and differential scanning calorimetry were used to study the effect of carbon fiber on the crystallization of polypropylene.

本文用偏光显微镜和示差扫描量热计方法研究了碛纤维对聚丙烯结晶行为的影响。

The phase transition and states of the lyotropic liquid crystals of chitosan in dichloroacetic acid were studied by polarized microscopy.

借助偏光显微镜研究了不同壳聚糖样品在二氯乙酸中的液晶相转变和液晶状态。

The lyotropic liquid crystal morphology of polycaprolactone/ethyl cellulose blends in dichloroacetic acid has been studied by a polarizing light micrograph.

利用偏光显微镜研究了乙基纤维素与聚己内酯共混物在二氯乙酸中的溶致性液晶形态。

The UV and IR spectroscopic studies of the monomer films showed that the photoreaction ratio of monomer (about 50%) was higher than the corresponding photosensitive polymer (about 10%, PVCi). The polarized IR spectra proved that obvious anisotropic absorption was displayed in the irradiated photosensitive film. With polarizing microscopy method, we found that these kinds of photoalignment films exhibited good alignment ability, and the stability of the photoalignment film could reach about 100℃. 2 A photosensitive self-assembled monolayer was fabricated that contained photo-cycloadditable groups, such as, coumarin and cinnamate. The reaction process were detected by contact angle method because the IR absorption of monolayer was very weak. The photosensitive self-assembled monolayer promote uniform alignment of nematic liquid crystals by LPUV, and it thermal stability could reach about 130℃. 3 A cationic bolaform amphiphiles was synthesized that had two photosensitive double bonds, and can be polymerized by ultraviolet. A layer-by-layer self-assembled deposition film was prepared in aqueous solution by using this material and poly (sodium 4-styrenesulfonate). The UV-Vis. spectra proved that the multilayers film was uniform and layer-by-layer. When LPUV irradiated the film, the photopolymerizable double bond underwent [2+2] cycloaddition, and the production of the reaction distributed along the polarized direction of incident LPUV. Polarized UV-Vis. spectra indicated that the irradiated self-assembled multiplayer film was anisotropic, and the dichromic ration is about 0.09, it is higher than the spin-coating method of photosensitive polymer or monomer. We used this anisotropic film as alignment layer of nematic liquid crystals, and obtained a uniform and stability alignment result, the static contrast ratio is about 100, which is very close to application of liquid crystal device. This thesis is an instance that the photochemical material was used in the physics region of liquid crystals, the route that was from photosensitive monomer, self-assembled monolayer film to self-assembled multiplayer film was undergone, by this logical research method photoailgnment of liquid crystal was extended and consummated.

围绕上述思路开展了如下工作：1合成了三种可进行光二聚反应的光敏小分子单体，LPUV 辐照制作了光控取向膜；用紫外-可见光谱法和红外光谱法分析了薄膜中的光化学反应，发现小分子的光反应程度可达到50%以上，至少比光敏高分子高出5倍；薄膜的偏振红外光谱证实，经过LPUV 辐照后薄膜出现了明显的各向异性；将小分子光控取向膜制成液晶器件，在偏光显微镜下观察看到均匀一致的液晶取向；并且热稳定性达到100℃左右，接近实用化要求。2制备了含肉桂酸、香豆素基团的自组装单层膜；采用接触角的方法监测自组装反应的动力学过程；紫外-可见光谱证实了自组装单层膜在石英基板表面形成；自组装单层膜经LPUV 辐照后能诱导液晶均匀取向，而且热稳定性可达130℃，热稳定性进一步提高。3合成了含有光敏双键的双季铵盐，在水溶液状态下将它和聚乙烯基苯磺酸钠沉积生成layer-by-layer 自组装多层膜，紫外-可见光谱证实这是一个逐层均匀的沉积；在LPUV 照射下，自组装膜中的光敏双键按照偏振方向发生[2+2]环加成反应，形成取向膜，用二向色性值评价的分子取向度高于高分子及小分子光控取向膜的水平；实验证明用自组装多层膜制成的液晶器件亮暗态均匀，静态对比度约为100，达到实用化器件的水平。

Twelve regular copolyesters were synthesized by solution polycondensations of the four monomers with hydroquinone, chlorohydroquinone, 4,4'-dihydroxy biphenyl. The copolyesters were characterized by polarized microscope with hot stage, DSC and X-ray diffraction.

将上述单体与对苯二酚、氯代对苯二酚以及联苯二酚用溶液缩聚的方法合成了十二种规则共聚酯，并用热台偏光显微镜、DSC、X-衍射等方法对共聚酯进行了表征。

A series of hydrogen-bonding associated main-chain complexes based on dipyridyl and dicarboxylic acid derivatives have been prepared by slow solvent evaporation, and a comparative investigation has been conducted on their thermotropic phase transitions and liquid crystalline behavior by FTIR, DSC and polarized optical microscopy.

采用慢挥发溶剂组装方法制备了一系列羧酸/吡啶氢键缔合的主链型超分子复合物，并采用FTIR， DSC以及偏光显微镜等对其相转变与热致液晶相行为进行了比较研究。

Using the SEM, polarized light microscope and X-ray analytical method, granule morphology, granulitization and Non-crystalline of starch with non-crystallized granule state were investigated. Corn, tapioca and potato of non-crystalline had blowing out pole. Some poles of non-crystallized corn were big and deep, and the other little and low. Pole of tapioca of non-crystalline was low, and pole of potato was a big, deep stripe.

采用扫描电镜、偏光显微镜、X-射线等分析测试手段，对非晶颗粒态淀粉颗粒形貌以及颗粒性、非晶性进行了研究，发现非晶玉米、木薯、马铃薯淀粉均具有爆裂孔，其中非晶玉米淀粉颗粒的孔有的大而深，有的小而浅；而非晶木薯淀粉颗粒的爆裂孔较浅，而非晶马铃薯淀粉则形成一大而深的长条形的爆裂孔。

It was proved by the DSC and heatable stage polarizing microscope that in the temperature falling process, the initial temperature of the crystallite was 5 - 20 ℃ lower than that of the reference sample.

测试结果显示：这种复合材料的纺丝温度降低了15℃左右，DSC和热台偏光显微镜实验证实了在降温过程中，微晶出现的起始温度比对照样品降低了5～20℃。

We studied their properties by IR, NMR, OPM and DSC and found that the ratio of Cu2+/DK-C11-C12 affects the mesomorphic temperature range and the results show that chelating units can play a mesogen function.c Synthesis and mesomorphic properties study of Cu-coordinating liquid crystalline polysilsesquioxanes with heptyl group on the side chain.

2对以β-二酮为侧链的梯形无规聚硅氧烷铜络合物用IR，NMR进行了结构表征，用DSC，偏光显微镜等方法进行了液晶性能的表征，并与同类化合物的性能进行了比较和研究，结果表明：Cu~(2+)含量对液晶相温度区间有明显的影响。

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。