耐热的

The effects of various antioxidants on the discoloring behavior and the mechanical properties of the PA6 specimens during the course of thermal-oxidative aging were systematically studied.

研究结果表明：使用胺类抗氧剂能明显地改善PA6的抗热氧老化变色性能，还能使其保持较高的热稳定性能和力学性能，并大大延长PA6的静态使用寿命；用酚类抗氧剂/亚磷酸酯抗氧剂组成（1：1）的稳定体系能对改善PA6的耐热氧老化性能产生协同效应。

Foamed metal can be used in many fields,especially in structural material and functional material.

多孔泡沫金属材料是近来得到日益发展的一种新型材料，其特点是它的内部由连续或不连续的气体与基体金属构成，因而具有特殊的性能，如能量吸收性、渗透性、阻燃耐热性等，在结构材料、功能材料领域具有极高的开发应用价值。

The featuresof this method are obtained, i.e. the degradation of PP is not avoided, MAHcan be reacted inside the PP particles by diffusion, grafted polymer has higherpyrolytic degradation temperature than pure PP, the sizes of crystallite ingrafted polymer are smaller than those of pure PP.

在接枝聚合中，选用低能耗、低环境污染的固相法制备PP-g-MAH，探讨了固相法的特点：PP降解不可避免；MAH能渗透进PP粒子进行反应；得到的接枝物具有较高的耐热温度；接枝物的微晶尺寸比纯PP的小。

College of Chemical Engineering, Guizhou University, Guiyang Guizhou 550003, ChinaAbstract:In the course of polymerization of tung oil modified phenol aldehyde resin, by adding some SiO2 nanometer particles which have been scattered, compound modified heat-curable NTPF was made.

在桐油改性酚醛树脂的聚合过程中，添加经过分散的SiO2纳米粒子，制备成复合改性的热固性NTPF，经过SETARAMTG-DSC92-16热分析仪测试NTPF的耐热性有明显的提高。

The experiment results showed that the rigidity of the composite inchlorinatedcis-1, 4-polybutadieneeased as the content of the fiber inchlorinatedcis-1, 4-polybutadieneeased, and the tear strength, the modulus at 20% in L directionalso inchlorinated cis-1, 4-polybutadieneeased; thereinto, the reinforcement effect ofnylon short fiber was the best, and the cotton powder short fiber was the worst.

结果表明，短纤维氯化顺丁橡胶复合材料随纤维含量的增加，硬度不断增大，在L向拉伸时，撕裂强度、定伸应力提高，尼龙短纤维的补强效果最好，棉粉短纤维的最差；随纤维含量增加，短纤维氯化顺丁橡胶复合材料整体耐热老化性得到了极大改善，短纤维-氯化顺丁橡胶复合材料的性能呈现明显的各向异性。

Compared to the control, the Rosachinensis var floribunda treated with CaZ+and SA maintain higher levels of antioxidantenzyme activeties, inhibited the electrolytic leakage of membrane, and diminished thecontent of MDA in Rosa chinensis var floribunda under high temperature stress.

近年来，由于&温室效应&的作用，全球气候逐渐变暖，高温天气的出现同益频繁，高温对植物的生长和发育产生了许多不良的影响。所以研究高温胁迫对丰花月季生理效应和耐热性诱导具有现实意义，为丰花月季的引种栽培及生理效应提供参考。

The development condition of constant velocity joint grease, wheel bearing grease,electrical installation bearing grease and electrical contactor grease are intro- duced.

汽车向小型和轻量化的方向发展，很多部件的结构发生了变化，使润滑条件变得苛刻，对润滑脂的耐热性能和长寿命提出更高的要求，介绍了汽车等速节润滑脂，轮轴轴承润滑脂，电装置轴承润滑脂和电触点润滑脂的发展状况。

The mechanical properties of the modified material were tested, and the thermal stability of the modified EP blend was also investigated by TG. The results indicate that the graft copolymerization between PU and EP effectly inforces the miscibility of the PU/EP system. Compared with the properties of pure EP, the impact strength and tensile strength of the PU/EP with high thermal stability are markedly enhanced, and the fracture surface of the PU/EP system displays tough fracture features.

研究结果表明：PU和EP分子链之间存在着化学接枝反应，能有效地改善PU/EP体系中PU和EP分子间的相容性及相互贯穿；与TDE-85与E-51的混和环氧树脂比，PU改性TDE-85与E-51的混和环氧树脂仍然具有很强的耐热性能，并且冲击强度、拉伸强度均获得显著提高；PU/EP体系断口裂纹呈明显的韧性断裂特征，说明TDE-85与E-51的混和环氧树脂PU改性增韧效果明显。

In order to improve the compatibility of these blends while maintaining the length of the in-situ formed TLCP fibrils and thermal resistance properties of TLCP, several novel compatibilizers, such as block and graft polymers, sulfonate ionomers, reactive oligomers, have been used to compatibilize PSF/TLCP blend.

为了在改善原位复合体系相容性的同时尽量保持TLCP的成纤性和体系的耐热性，本文提出了用嵌段及接枝共聚物、磺化聚砜锌盐、带有高反应活性基的反应性低聚体、可交联型低聚物作为增容剂改进体系的相容性。

In high ─ speed steel, molybdenum can replace parts of tungsten.

钼铁是钼与铁的合金，它的主要用途是在炼钢中作为钼元素的加入剂，钢中加入钼可使钢具有均匀的细晶组织，并提高钢的淬透性，有利于消除回火脆性，在高速钢中，钼可代替一部分钨，钼同其他合金元素配合在一起广泛地应用于生产不锈钢、耐热钢、耐酸钢和工具钢，以及具有特殊物理性能的合金，钼加于铸铁里可增大其强度和耐磨性。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。