您要查找的是不是:
- The miscibility of three kinds different soft segments (polycaprolactone, polypropylene oxide, polytetramethylene oxide) polyurethanes possessing the same hard segmental structure and content with PVC or CPVC blends were studied by DSC. 采用示差扫描量热法研究了相同硬段及含量的3种不同类型软段的聚氨酯与聚氯乙烯(PVC)、氯化聚氯乙烯(CPVC)的相容性。
- Keywords anionically aqueous polyurethane dispersion;polyols containing ionic groups;soft segment structure;adhesives;dispersion technology.; 阴离子水性聚氨酯分散液;含离子基团的多元醇;软段结构;胶粘剂;分散工艺;
- soft segment structure 软段结构
- It's caused by the micro phase separation degree of TPU is increased as well as the soft hard segment structure is perfected. 研究认为热处理提高了TPU的微相分离程度,完善了TPU中的软硬段结构。
- Keywords soft segmental structure;polyurea urethane;chain extension reaction;kinetic; 软段结构;扩链反应;聚脲基氨酯;动力学;
- Objective To study the changes of the ocular anterior segment structure and the mechanism of angle-closure glaucoma after scleral buckling surgery. 目的观察巩膜环扎术后眼前节结构的变化,探讨术后继发性闭角型青光眼的发病机制。
- The damping property of polyurethanes is influenced by the molecular weight of soft segment in main chain and the content of graft chain. 主链软段的分子量和接枝链上软段的含量对聚氨酯的阻尼性能有较大的影响。
- The T g of polyester soft segment is higher than of polyether soft segment,and the elastic modulus increases in the order of PPG PEG PTMG in the PU elastomer. 在PU弹性体中 ,聚酯软段比聚醚软段的Tg 高 ,弹性模量依PPG、PEG、PTMG软段顺序增加
- We also observed the phenomenon of soft segment enrichement on the surface of SPU film by IGC, and the results were compared with those obtained from the ESCA experiments. 苯及几种烷烃和聚醚氨酯的偏摩尔混合热和它的溶度参数与软段组分的溶度参数差值有关。
- The influence factors on microphase separation of waterborne polyurethane were studied, including soft segment type, DMPA content and different NCO/OH ratio. 合成了一系列水性聚氨酯,考察了软段组成、二羟甲基丙酸(DMPA)含量及不同NCO/OH比值对产物微相分离的影响。
- Characteristic chain segment structure composition and distribution and monomerchain segment distribution in VDF/CTFE copolymer were effectively characterizedand measured by using NMR and Py-GC/MS. 运用NMR和Py-GC/MS方法能有效地对VDF/CTFE共聚物中特征链节结构组成及分布和单体链节分布等进行表征和测定。
- Conclusion The repair of scleral rupture with anterior vitrectomy may prevent retina or choroid incarceration and create the chance of reconstruction of posterior segment structure. 结论前段玻璃体切除在巩膜裂伤修补中,有效地防止了视网膜或脉络膜的嵌顿,为进一步重建眼后段结构创造了基础。
- The effects of hard segment structure, hard segment content and chain extender with different structure on physical mechanical properties of dry films and water absorption were studied. 研究了不同硬段结构和硬段含量和扩链剂对其干膜物理机械性能和吸水率的影响。
- At the same time, the influence factors on microphase separation of waterborne polyurethane were studied by FTIR and DSC, including soft segment type, DMPA and chain-extender contents, different NCO/OH ratio. 同时通过红外光谱(FTIR)、示差扫描量热法(DSC)等手段考察了软段组成、二羟甲基丙酸(DMPA)含量及不同NCO/OH比值和扩链剂用量对产物微相分离的影响。
- Both effects of soft segment molecule weight and various NCO content of prepolymer on physical mechanical properties of dry films and effects of neutralizer type on emulsion properties were studied. 研究了软段相对分子质量、预聚体的NCO含量对其干膜物理机械性能的影响以及中和剂种类对乳液性能的影响。
- To improve the biocompatibility, anti-biofouling property and chemical stability of polyurethanes, poly(dimethylsiloxane) (PDMS) was usually incorporated into polyurethanes as a soft segment. 近年,为改进生物防污性能,聚二甲基硅氧烷(PDMS)由于具有优异的抗氧化性,热稳定性,良好的生物相容性和低的表面张力等,以PDMS作为软段的聚氨酯嵌段共聚物已成为最为活跃的研究领域之一。
- The interaction between the shield and segments and transverse isotropic characteristics of the segment structure are taken into consideration in the model. 模型中考虑了盾构机与管片衬砌的相互作用,以及管片衬砌结构的横观各向同性性质。
- The dissertation is intended to provide consumable manufacturers an approach to understand the market segmentation structure, so as to create the new product strategy. 论文试图解决这样一个问题:在当前国际国内竞争日益加剧的环境下,汽车等消费品制造企业如何正确认识市场细分结构,以便于科学部署与实施其新产品战略。
- The soft segments based on polyether, and functional chain extender PDSA would be resulted into the better degree of dispersion on the nanocomposites. 由实验结果显示,奈米复合材料的分散性取决于有机黏土含量、聚胺酯软链段及链延长剂的种类。
- We report 4 cases of posterior microphthalmos, that both shape and size of anterior segment structures are within normal limits, whereas the posterior portion of the globe is foreshortened. 摘要深度远视在一般人口中极少见,它常合并有小眼症,本篇报告四例后部小眼症,经检查得知其角膜大小、前房深度、晶体厚度均正常,但其眼球后部玻璃体腔较短;
- 今日热词
-
- 深远海浮式风电平台 - deep-sea floating wind power platform
-
- 京雄高速公路 - Beijing-Xiongan expressway
-
- 农业及相关产业增加值 - the added value of agriculture and related industries