查询词典 brittle

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。

On the basis of a study of Carboniferous coal measures in the northern foothills of the Dabie orogenic belt and by using the microscopic and ultramicroscopic techniques, the structural coal is subdivided into brittle-deformed coal and ductile-deformed coal.

以大别造山带北麓地区石炭纪含煤岩系为研究对象，利用显微及超微分析手段，将构造煤划分为脆性变形和韧性变形两大类。

Avrami and Ozawa equations were used to analyze the experiment data in this study. Because the melting point of PBS is high and the mechanical properties are worse. In addition, the PTS is uncrystallized. Therefore, PBS and PTS were mixed to improve their properties. PBS containing 5wt% PTS can be able to reduce the crystallization performance, and make the polymer strength to enhance. Furthermore, the brittle fracture situation of PBS is also improved simultaneously.

本研究运用等温结晶分析使用的Avrami 方程式以及Ozawa 方程式，分析实验所得的数据，因为PBS 的熔点较高，机械性能较差，加上PTS 几乎不结晶的特性，因此将PBS 及PTS 以不同比例混掺的方式，对PBS 进行分析研究，结果发现，加入5wt% PTS的共聚酯能够明显的降低结晶性能，进而使聚合物的拉伸强度提高，同时脆性断裂的情况也得到改善。

Uncured natural rubber is sticky, easily deforms when warm, and is brittle when cold. In this state it cannot be used to make articles with a good level of elasticity .

一般需经过硫化的橡胶品种有丁二烯、氯丁二烯、异戊二烯的1，4-聚合物--顺丁、异戊、氯丁橡胶，以及共聚物丁苯、丁基和丁腈橡胶等。

These three ductile to ductile-brittle meso-shallow deformational belts made up a complete plate （micro-landmass） condensation zone, indicating that the Kalatongke island arc underthrust, towards northeast to east, the Keketuhai-Qinghe magmatic arc, then a continent-arc collision occurred.

结合区域地质分析，可认为这3个变形带共同组成一个完整的板块聚合变形带，显示喀拉通克岛弧以北东偏东方向俯冲于可可托海-青河陆缘岩浆弧之下，并发生弧-陆碰撞。

At best,these political structures are brittle and unresponsive to the need for change.

但这些政治因素的作用是微乎其微的，对于授权的合理性也一样。

It is a silvery white, hard, brittle metal, widely distributed in Earth's crust in combination with other elements.

为银白色、质硬而脆的金属，与其它元素混合广泛分布于地壳中。

We have found that the brittle material, such as Epoxy, must have excellent interfacial adhesive strength and changeable layer which can transmit stress, induce craze and yield to contract the spread of the craze from force analysis of a single particle.

得出对环氧树脂这类脆性材料，不仅要有良好的界面粘结，而且要有可变形的柔性层，这样才有利于应力在界面层的均匀传递，引发银纹，屈服并终止银纹的扩展，才能起到增韧的效果。

Unfortunately, zwieback was very hard and brittle and when a patient broke a tooth eating one, Dr.

不幸的是， zwieback非常硬脆，当一个病人吃了一颗牙的一个博士，凯洛格规定发明一种新的健康干麦片。

For ecosystems in Dinghushan region,there is the great potential offrangibility that results from brittle ecological environment,and is also the greatpotential of stability that result from adjustive abilities of interaction compensationand self-organization.

区域的脆弱性、生态环境基础的脆弱性、景观类型的脆弱性、水热耦合的脆弱性、异常气候的脆弱性、养分循环的脆弱性以及植被结构的脆弱性。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。