韧

With PA1010 as matrix material,maleic anhydride grafted ethylene-propylene rubber as toughener,PA1010／MGEPR blend was prepared by means of Brabender PLE331 Rheometer.The apparent viscosity,non-Newtonian indx and melt activation energy of the blend were determined,and the rheological properties of the blend were centered on in our study.

以尼龙1010(PA1010)为基体，以马来酸酐接枝乙丙橡胶为增韧剂，采用Brabender PLE331型塑化仪制备了PA1010／MGEPR共混增韧尼龙材料，测试了PA1010／MGEPR共混物的表观粘度、非牛顿指数和粘液活化能等流变参数，并重点讨论了其流变性能。

However, the Izod impact strength of PHB can not be improved in this way. 6. Adding plasticized PPC, a good toughener for PHB, into PHB can change its fracture behavior from brittle to ductile, and increases the Izod impact strength from 36J/m for PHB to 307J/m for 70PHB/30PPC/20PGC.

增塑后的PPC是PHB的良好增韧剂，使PHB由脆性断裂转变为韧性断裂，最佳增韧效果可使PHB的抗冲击强度由36J/m增加到70PHB/30PPC/20PGC的307J/m，增加8倍。

The PBT/E-MA-GMA/CaCO3 composite which were mixed directly with CaCO3 and E-MA-GMA together have better impact strength and tensile strength than that of PBT mixed with CaCO3 capsulated by E-MA-GMA.

研究了两种弹性体(E-MA-GMA、POE-g-MAH)分别与PC并用对PBT的增韧改性作用。未加入PC的PBT/E-MA-GMA共混物在E-MA-GMA含量达到15%时，发生脆韧转变，缺口冲击强度为51KJ/m2。

Methods Suturing coracoclavicular ligament after clavicular hook plate fixation was applied in treating acromioclavicular dislocation in one group of 23 cases ;in the other group of 24 cases the suturing was not applied .

应用锁 。。。目的比较锁骨钩钢板固定后缝合喙锁韧戴煳不缝合喙锁韧戴两种方法治疗肩锁关节脱位的临床效果。

objective To compare the therapeutic effects between suturing coracoclavicular ligament and not suturing coracoclavicular ligament after clavicular hook plate fixation in treating acromioclavicular dislocation.

代写医学论文代发医学职称论文电话：13296551955 Q Q：273322232 助医代写论文网：目的比较锁骨钩钢板固定后缝合喙锁韧戴煳不缝合喙锁韧戴两种方法治疗肩锁关节脱位的临床效果。

A novel flexbilizing agent is designed by mixing farraginous short fibers that can greatly improve the performance of cement annulus.The optimal content of thirteen kind of fiber is confirmed by testing the flexure strength.

本文利用混杂短纤维研制成功油井水泥增韧剂FR，该增韧剂能够明显克服水泥石固有的脆性，大幅度提高水泥环韧性。

The Solidification temperature range was defined as 110-200℃ by DSC analysis. More accelerant used can increase the casing samples dynamic performance, but more than enough accelerant can induce a severe solidified reaction that result in a smaller polymeric meshwork and reducing the sample's performance. Normally the Accelerant dosage can be 2 portions; The Epoxy resin CFRP has a obvious better performances than the Vinyl-ester Resin CFRP, i.e. had a Bend Strength of 1516MPa, LSS of 85MPa, also Tg raised to 195~C~ When used the end-carboxyl polyether to reinforce the epoxy resin, the casing sample's SS, BS and Crack Elongation all increased geminately. The CFRP performance also increased a little, that is because the performance of the CFRP mainly contributed by the CF. The reinforced resin improved the interface between the CF and resin that contribute to the little increasing.

通过DSC分析确定了该环氧树脂的固化温度范围为110~200℃，促进剂增加会提高浇注体力学性能，但过多的促进剂会使固化反应剧烈，聚合网络减小，使浇注体性能下降，一般用量为2份左右；以环氧树脂为基体的复合材料性能明显比以乙烯基酯树脂的性能提高，弯曲强度达到1516MPa，层间剪切强度达到85MPa，同时Tg也上升到195℃；用端羧基聚醚增韧环氧树脂后，其浇注体的拉伸强度、弯曲强度及断裂伸长都成倍增加，复合材料的性能也有所提高，但提高幅度不大，因为复合材料的力学性能主要由碳纤维承担，树脂增韧后改善了复合材料的界面性能。

The results show that the toughness of over-heated zone increased greatly because of austenite film lying in lathy martensite and a few ferrite.The toughness of fine grained zone decreased due to many factors,such as acicular martensite,a small quantity of austenite film,carbide separation and so on.

结果表明，10Ni8CrMoV这一新型钢种的模拟焊接热影响区的过热区和细晶区表现出与绝大多数材料完全相反的规律，过热区存在少量的铁素体组织，马氏体板条束之间形成了一定量的奥氏体薄膜，这些韧度相的存在使得过热区的冲击韧度与基体相比有了较大的提高；细晶区部位奥氏体含量很少，细小的板条马氏体端部呈针状特征造成应力集中，易于诱发裂纹。

SEM analysis finds that the fractures are intercrystalline plus quasi-cleavage fractures under quasi-motionless state;with the increase of stress intensity factor,fractureschange from transcrystalline quasieleavage fractutes to microvoid-coalescence dimple plus cleavage frac-tures,The increase of fracture toughHess of 8090Al-Li alloy under high stress intensity factor is associ-ated with the deformation mechanism and the change of precipitation Free Zone of grain boundary.

扫描电镜分析发现，准静态下的断裂为沿晶和准解理混合断口；随着应力强度因于的增加，断裂从准解理断裂过渡到准解理和显微空穴聚集的韧窝断裂舶混合断口。高应力强度因于率下断裂韧度的提高与其变形机制和晶界无沉淀区的变化有关。

You should be careful in ordering a very inexpensive brush made with untempered wire may last only 30% as long as high tempered, quality brush wire.

价格较低的轮刷，其刷丝缺乏韧度，使用寿命也只有高韧度、高品质轮刷的30％大部分轮刷都有直径为2英寸的轴心孔(转接器的轴可从其中穿过)，刷轴边宽为1/ 2至1英寸

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。