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- 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。
- 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 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。
- Segmented polyurethanes containing amorphous soft segments as reversible phase and crystalline hard segments as fixed phase can exhibit shape-memorizing properties. 摘要聚氨酯是一种多嵌段共聚物，可通过调节原料的组成和配比，得到性能各异的新型功能高分子材料。
- It was shown, that contents of hard segments and molecular weights of soft segments affect the. block copolymerization reaction, especially, the formation of homopolymer. 研究了硬段含量和软段分子量对嵌段共聚合过程的影响。当软段分子量较大、硬段含量较高时,在嵌段共缩聚过程中有均聚物伴生。
- Segmented polyurethanes containing amorphous or crystalline soft segments as reversible phase and crosslink points as fixed phase can exhibit shape-memory properties. 聚氨酯是一种具有微相分离本体结构的多嵌段共聚物,可通过调节原料的组成和配比,得到性能各异的新型功能高分子材料。
- A line segment that joins two points on a curve. 弦将两点用曲线连接起来的曲线段
- She cleaned a small segment of the painting. 她把画儿上的一小部分擦干净了。
- The abdominal segment of an insect. 腹面昆虫的腹部体节
- Soft drinks are much in demand this hot weather. 这么热的天气，软饮料需求量很大。
- The company dominates this segment of the market. 这家公司控制了这一部分市场。
- He was fawning on a damsel with soft words. 他正用甜言蜜语向一位女郞献殷勤。
- I've always had a real soft spot for him. 我一向对他挺有好感。
- Most animals are soft and fluffy when first born. 大多数动物刚出生时都很软，身上有绒毛。
- The mud was soft and our feet sank in. 泥很软，我们的脚都陷进去了。
