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rigid segment
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  硬段
     The resultsshow that the Shore A hardness of products is 85, the tensile strength is about 12MPa, the tear strength is about 25kN/m, the elongationis about 400% when the mass fraction of rigid segment is 40%.
     结果表明:当硬段质量分数为40%时,制品邵A硬度为85,拉伸强度为12MPa,撕裂强度为25kN/m,伸长率为400%。
短句来源
     PUI samples have much greater elastic modulus and tensile strength than PU. In the same rigid segment content, the value of tensile strength for PUI and PU are 35.1MPa and 10.8MPa, respectively.
     PUI比PU具有更高的弹性模量及抗张强度,在相同硬段含量时,PUI的抗张强度为35.1MPa,而PU仅为10.8MPa。
短句来源
     IR spectra proved the formation of PI rigid segment. Tg analysis indicated polyester-type PUI and polyether-ester-type PUI with higher polyester content as the soft segment contained microcrystalline domain.
     红外光谱证实了聚酰亚胺硬段的存在 ,TG分析表明聚酯型 PUI的热稳定性高于聚醚型 PUI,DSC及 X射线衍射实验表明聚酯 PUI及聚酯含量较高的聚醚—酯混合二元醇作软段的PUI中有微晶区存在。
短句来源
     Increasing PSi soft segment benefited micro phase separation of rigid segment in the system,and short PSi and long polyether segment had good compatibility.
     增加PSi软段有利于体系硬段的微相分离,短的PSi链与长的聚醚链相容性更好。
短句来源
     A cast PU elastomer was prepared with polyester g lycol,toluene diisocyanate (TDI) and chain extender. The influence of prepolymeri zation and one-step polymerization,80/20 TDI and 2,4-TDI,type and molecular we ight of polyester glycol,molecular weight between crosslinking sites and molecul ar weight of rigid segment on the mechanical properties of PU elastomer was inve stigated.
     以聚酯二醇、甲苯二异氰酸酯 (TDI)和扩链剂为原料 ,制备浇注型PU弹性体 ,研究了预聚法和一步法、聚酯与聚醚、80 / 2 0 TDI和 2 ,4 TDI、聚酯二醇的种类及其相对分子质量、弹性体交联点相对分子质量和硬段质量分数对弹性体力学性能的影响。
短句来源
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  “rigid segment”译为未确定词的双语例句
     Synthesis of Single-chain Amphiphiles Containing 2,7-Substituted Naphthalene Rigid Segment and Self-organization of the Amphiphiles in Dilute Aqueous Solution
     单链2,7-取代萘刚性生色基双亲化合物的合成及其在稀溶液中的自组织
短句来源
     Introduction of alkyoxyl groups to the rigid segment, lowered the melting point, the longer alkyoxyl groups , the lower the melting point C4-C3-C3-C4 melted at 313℃, but unfortunately it decomposed above 350℃, which we attributed to the broken of the alky chain connected to the two perylene.
     C4-C3-C3-C4在350℃被炭化,因为连接两个苝环的烷基链被破坏。
短句来源
     increase of MMA-co-MAA in the blend will decrease the amount of reduced copper because of rigid segment in MMA and favors the formation of branch-like crystal.
     讨论了共混物的组成对PMGCF的电化学还原过程及最终复合膜内金属沉积形貌的影响,发现具有刚性分子链段的甲基丙烯酸甲酯与甲基丙烯酸的共聚物(MMA-co-MAA)组分的增加使得铜离子迁移困难,铜沉积量较少,铜结晶优先在枝端生长,利于树枝状晶的生成;
短句来源
     With the increase of rigid segment of the polymer, the phase transition temperature, thermal and mechanical properties of the liquid crystal polymer are elevated and improved.
     随着刚性链段的增长,液晶聚合物的相转变温度、耐热性和机械性等将提高。
短句来源
     It attributed to the rigid segment of N-maleoyl chitosan. Two or three days after dendritic crystals appeared,it was also found that needle-like crystals and lamellar crystals grew on the ends of the dendritic crystals. The maximum length of needle-like crystals was about 200 μm, and the average width of lamellar crystals was around 20 μm.
     研究发现,在N 马来酰化壳聚糖的N,N 二甲基甲酰胺溶液浇铸膜中,先出现常见的树枝晶,然后观察到在树枝晶的末端生长出针状晶体和片状晶体两类不同的结晶形态,针状晶体最长为200μm,片状晶体的宽度平均约为20μm.
短句来源
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  相似匹配句对
     Finite Segment Modeling of a Rotating FlexibleBody with Central Rigid Body
     带中心刚体的旋转柔性件有限段建模
短句来源
     The proposed method is successfully demonstrated by measurements on a segment of the rigid line.
     通过对一段连接线的测量证实此方法的有效性。
短句来源
     On Generalized Rigid Rings
     广义 Rigid环(英文)
短句来源
     Rigid Cutting and Practice
     硬切削刀具与实践
短句来源
     4.The facial segment.
     4.面段。
短句来源
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  rigid segment
The first series of SPEU contained no side branches, whereas in the second series, side branches in the form of long chains of aliphatic structure were present at the rigid segment.
      
While only the copolymers with long rigid segment PMPCS could form liquid crystalline phase, which was quite stable with a high clearing point.
      
It was found that the liquid crystalline behavior was dependent on the molecular-weight of the rigid segment.
      
Radiologic study revealed a rigid segment 10 cm long in the midesophagus, which was found to be aperistaltic on manometric evaluation.
      
It must include all intervertebral levels of the rigid segment of the curve.
      
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A preliminary investigation of the effects of chemical structure of polymer and filler on the friction wear behavior of some pastes has been carried out.The polymers with long fatty chain structure or main chain structure of amide bond or amido-ester bond show good wear resistance, especially poly amidoesters with two-phase structure of flexible segmenl and rigid segment.

本文对几种高聚物的耐磨性及摩擦系数和它们的化学结构与填料的关系进行了初步探索。具有较长脂肪链结构和具有酰胺键、氨酯键主链结构的高聚物,其耐磨性较好,尤其是具有软段和硬段两相结构的聚氨酯聚合物的耐磨性更好。 加入填料可以改变聚合物的耐磨性和摩擦系数。加入一定量的石墨。二硫化钼等固体润滑剂,可降低聚合物的摩擦系数,加入一定种类的金属粉和金属氧化物,可提高聚合物的耐磨性,改善聚合物的物理机械性能和耐介质、耐环境条件性能。根据上述探索结果,设计了六种耐磨润滑涂料,并列出了它们全性能检测结果。

The development of lyophilic liquid crystal polymer has stimulated the development of thermotropic liquid crystal polymer. The difference between these two polymers is that the latter can be melted and processed into fibre and film. Liquid crystal polymer, according to its structures can be classified into chain polymer and side-chain polymer. With the increase of rigid segment of the polymer, the phase transition temperature, thermal and mechanical properties of the liquid crystal polymer are elevated...

The development of lyophilic liquid crystal polymer has stimulated the development of thermotropic liquid crystal polymer. The difference between these two polymers is that the latter can be melted and processed into fibre and film. Liquid crystal polymer, according to its structures can be classified into chain polymer and side-chain polymer. With the increase of rigid segment of the polymer, the phase transition temperature, thermal and mechanical properties of the liquid crystal polymer are elevated and improved. The thermotropic liquid crystal polymet is in rapid development, particularly with Dartco Manufacturing Inc. A liquid crystal polymer called Xydar is made from biphenol, parahydroxy benzoic acid and terephthalic acid. It is the first liquid crystal polymer which can be processed by way of injection molding, thus setting up an important milestone in the area of high temperature plastics.

亲液性液晶聚合物的发展刺激着热致性液晶聚合物的发展。两者的区别在于后者能熔融模塑成纤维和薄膜。根据液晶聚合物的结构,可分为主链型和支链型两类。随着刚性链段的增长,液晶聚合物的相转变温度、耐热性和机械性等将提高。最近,热致性液晶聚合物在迅速发展中。尤以Dartco Manufacturing Inc.取得的进展最为显著。称为Xydar的液晶聚合物是由双苯酚、对羟基苯甲酸和对苯二甲酸制得,其为可以注射成型的第一种液晶聚合物,从而在高温塑料领域里树立了重要的里程碑。

Ether based uretuane/imide multi-block copolymers (PUI) were synthesized by PPG,MDI and PMDA for the first time. IR spectra proved the formation of PI rigid segments. The intrinsic viscosity [η] =0.34-1.20dL/g, TG and DTG analysis indicated that decomposition temperation Td of PUI are 344-348℃, while the Td of PU extended by butanediol (BD) is 323℃.Stress-strain behavior of PUI and PU samples were studied. Both of them belong to the typical of elastomer. PUI samples have much greater elastic modulus and...

Ether based uretuane/imide multi-block copolymers (PUI) were synthesized by PPG,MDI and PMDA for the first time. IR spectra proved the formation of PI rigid segments. The intrinsic viscosity [η] =0.34-1.20dL/g, TG and DTG analysis indicated that decomposition temperation Td of PUI are 344-348℃, while the Td of PU extended by butanediol (BD) is 323℃.Stress-strain behavior of PUI and PU samples were studied. Both of them belong to the typical of elastomer. PUI samples have much greater elastic modulus and tensile strength than PU. In the same rigid segment content, the value of tensile strength for PUI and PU are 35.1MPa and 10.8MPa, respectively. Extension behavior of PUI samples are similar to the classical vulcanizate. In the region of small deformation (extension ratio λ<1.8),σ-ε behavior consist with Guth's statistical theory of rubber networks, that isσ = G(λ-λ-2), In the region of large deformation (λ = 1.8-4.0) , Mooney-Rivlin equ. σ=(λ-λ-2) (2C1 + 2C2/λ) can describe the σ-εbehavior perfectly. Plots of σ/λ -λ-2vs.1/A do be linear with a slope of 2C2.It was interestingly found that 2C2 of various PUIs remain constant and ate independent of hard-segment content, just as the 2C2 for crosslinked rubber are independent of their vulcanization degree.

以聚环氧丙烷二醇(PPG)、MDI,均苯四酸二酐(PMDA)为单体,首次合成了不同硬段长度的醚氨酯-酰亚胺嵌段共聚物(PUI),红外光谱证实了聚酰亚胺硬段的存在。PUI的特性粘数(32℃,DMAc)[η]为0.34~1.20dL/g。TG及DTG分析表明,PUI的热分解温度(N_2)为344~348℃,而以丁二醇为扩链剂的同类PU为323℃。 研究了PUI及PU的应力-应变行为,二者皆属典型的弹性体。PUI比PU具有更高的弹性模量及抗张强度,在相同硬段含量时,PUI的抗张强度为35.1MPa,而PU仅为10.8MPa。PUI的形变行为与典型的交联橡胶不一致。在拉伸比λ<1.8时服从Guth统计理论σ=G(λ-λ~(-2));在大形变区服从Mooney-Rivlin应变能函数式σ=(λ-λ~(-2))(2C_1+2C_2/入),2C_2的数值与硬段含量无关,正象交联橡胶的2C_2与硫化程度无关一样,因而硬段含量与硫化程度有相当的含义。

 
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