讨论了共聚物性能同硬段含量的关系。
The relationship between their properties and content of hard segment were discussed.
硬段分布对该聚氨酯体系的相容性及阻尼性能有较大影响。
The factors increasing the interaction between hard and soft segments can improve the compatibility of polyurethane.
而形状记忆的恢复率及恢复速度则决定于硬段相区域的稳定性。
The final recovery rate and the recovery speed are mainly related to the stability of the hard segment domains.
硬段含量提高，胶膜硬度增加，拉伸强度增加，胶膜耐水性降低。
An increase of the content of hard segmer will increase film hardness and elongation strength, and lower water resistance.
丙烯酸改性与乳化同时进行时，其聚合物链结构中软、硬段分布均匀；
Soft and hard segments in polymer chains were well-distributed when acrylate modification and emulsification performed at the same time.
认为这些平面氢键可以通过进一步键合来形成硬段微区中的三维氢键。
Three dimensional hydrogen bonding in hard segment domains can be formed by further bonding of the above planar hydrogen bondings.
结果表明，硬段含量对材料力学性能影响最大，其次是有机蒙脱土含量。
The results showed that the influence of hard segment content on aliphatic PU mechanical properties is the biggest, while the content of organic modified montmorillonite is the second.
随着硬段含量的提高以及氢键的形成，硬段的玻璃化温度是逐步升高的。
Tg of the hard-segment enhances with increasing hard-segment content and forming much H-bonds.
受热史对聚合物的玻璃化温度有较大的影响，随着硬段含量的增加而变大。
Glass transition temperature goes up with the hard segment content increase. Heat history affect on glass transition of polymers apparently.
发现在该共混体系中，聚氨酯硬段与聚丙烯腈之间存在一定程度的相互作用。
It was found that there existed some interaction between the hard segment of polyurethane and polyacrylonitrile in this polymer blend system.
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。
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.
随着盐浓度进一步增加，聚合物-离子相互作用增强，体系中硬段结构出现新的聚集形态。
With further increase of salt concentration, interaction between polymer and ion enhanced, which brought about the formation of new hard - segment aggregates.
研究了合成方法、软段及硬段组成结构、熟化条件等因素对聚氨酯弹性体力学性能的影响。
The effects of synthetic method, components of soft segment and hard segment, post cure on the mechanical properties of polyurethane elastomers were studied.
采用SALS等方法研究了低硬段含量的聚酯-聚醚多嵌段共聚物中硬段结晶时的球晶生长规律。
The spherulite growth behaviour of hard segment has been studied by SALS and other techniques for polyester-polyether block copolymers with low hard segment content.
取向的结果，导致大量的硬段残留取向、应力软化、应力滞后和高变形，以及材料的高模量和高强度。
The orientations of polyurethanes resulted in a large number of the residual orientation , the stress softing and stress hysteresis , the permanent set , the higher modulus and strength of materials .
多嵌段聚氨酯硬段含量的增加，加强了SPU分子间的相互作用，同时也减小了共混物两组分的相容性。
When increasing hard segment content, the interaction between SPU moleculars is intensified whereas the miscibility of the blends in decreased consequently.
交联结构对软、硬段之间的相分离产生更大的影响，但对硬段相中短程有序区的氢键的影响与交联结构的类型有关。
The existence of cores and cross-linked structure between core and shell made much effect on the phase behavior of the nanocomposites.
结果表明，硬段含量及密度对PUEF压缩应力-应变性能的影响较大，而交联度对压缩应力松弛及拉伸性能的影响较大。
Influences of the hard segment content, crosslinking degree and density on the compressive stress-strain property, compressive stress relaxation and tensile property of PUEF were studied.
先制备具有均一链长的含有酰胺键的硬段单体，然后与二元醇进行缩聚反应生成酯键是制备性能良好的聚酰胺酯的较好途径。
Ester bond can be formed through the polycondensation of hard segment monomer with uniform segment length containing amide bond and dihydric alcohol, which is a better way to prepare polyesteramide.
通过海洋大气环境户外暴晒老化试验和盐雾加速老化试验，试验研究了不同硬段含量的聚天冬氨酸酯（PAE）聚脲涂层的耐海洋环境老化性能。
Polyurea coatings with different contents of hard segment polyaspartic ester(PAE) were investigated through aging tests of marine environment outdoor exposure and salt fog testing.
以液态聚硫橡胶、异氟尔酮二异氰酸酯和扩链剂3，6 -二甲硫基-2 ，5 -二甲苯胺为原料，合成了不同硬段质量分数的聚硫硫代聚脲。
A series of polysulfide based thio-polyurea was synthesized, which were based on isophorone diisocyanate, liquid polysulfide and 2,5-diamino-3,6-dimethylmercapto toluene.
通过DSC、弯曲实验和力学实验，研究了形状记忆聚氨酯的性能，发现软段高度结晶和硬段聚集形成硬段微区是其具有较好形状记忆性能的必要条件。
It was found that the high crystallinity of the soft segment regions and the formation of hard segment domains are the necessary conditions for polyurethanes with good shape memory behavior.
采用一步法合成以4 ，4 '-甲烷二环已基二异氰酸酯（HMDI）、扩链剂1，4 -丁二醇（BDO）为硬段，聚四氢呋喃醚（PTMG）为软段的脂肪族聚氨酯。
The one step method was adopted in this study to synthesize aliphatic polyurethane with 4,4 methylene dicyclohexyl diisocyanate(HMDI), 1,4 butanediol(BDO) and poly (tetrahydrofuran)(PTMG).
现在你可以有一段时间不用再吃干硬的黑面包了。
Now you won't have to eat hard black bread any more for a little while.
这完全不是想我们猜想的那样是靠死记硬背的,也许你上音乐课的时候,你的老师或和你妈妈会说,记下这一段,而这段音乐不是像那样靠死记硬背的
Well, it's not memorized as we think of it and you may have had music lessons along the way and your teacher and your mother said "Go memorize your piece." It's not memorized like that.
离开硬路面，我们接着拐进一条岔道，心中的很多忧虑这时已被抛之脑后，于是开始了一段颠簸的骑行，道路泥泞不堪，凹凸不平，却是通往心中的乐土。
As we exited the pavement, I left many of my concerns behind and began the bumpy ride on the rutted dirt road to paradise.
这种类型的血块是已知的作为慢性硬膜下出血，并能保持未被发现了一段时间。
This type of clot is known as a chronic subdural haemorrhage, and can remain undetected for some time.
差示扫描量热分析表明，水分散过程破坏了亲水性硬链段的有序性。
Differential scanning calorimetry analysis revealed clearly that order of hydrophilic hard segments was destroyed after water dispersion.
当拉伸倍率大于80 %时，NH基团也发生取向，即在外力作用下，软链段较易取向，而硬链段的取向较难。
NH groups Orient too when draw ratio is beyond 80%, which indicates that it is easy for soft segments but difficult for hard segments to Orient under the effect of outside force.
当拉伸倍率大于80 %时，NH基团也发生取向，即在外力作用下，软链段较易取向，而硬链段的取向较难。
NH groups Orient too when draw ratio is beyond 80%, which indicates that it is easy for soft segments but difficult for hard segments to Orient under the effect of outside force.
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