Product Code:SAE AIR1387
Title:Designing With Elastomers for Use At Low Temperatures, Near Or Below Glass Transition
Issuing Committee:Ams Ce Elastomers Committee
Scope:To ensure success in design of elastomeric parts for use at low temperature, the design engineer must understand the peculiar properties of rubber materials at these temperatures.There are no static applications of rubber. The Gaussian theory of rubber elasticity demonstrates that the elastic characteristic of rubber is due to approximately 15% internal energy and the balance, 85%, is entropy change. In other words, when an elastomer is deformed, the elastomer chain network is forced to rearrange its configuration thereby storing energy through entropy change. Thermodynamically, this means that rubber elasticity is time and temperature dependent (Reference 25).The purpose of this report is to provide guidance on low temperature properties of rubber with the terminology, test methods, and mathematical models applicable to rubber, and to present some practical experience. In this way, it is hoped that mistakes can be avoided, particularly in selection of rubber materials, enabling the design engineer to weigh low-temperature material properties together with the many other factors involved in the design process.【英文标准名称】:StandardSpecificationforUseofSilicaFumeforUseasaMineralAdmixtureinHydraulic-CementConcrete,Mortar,andGrout
【原文标准名称】:水硬水泥混凝土、灰浆和薄浆中作为矿物添加剂的硅酸气体使用的标准规范
【标准号】:ASTMC1240-2001
【标准状态】:作废
【国别】:美国
【发布日期】:2001
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:添加剂;灰浆;混凝土;水泥
【英文主题词】:mortars;concretes;additives;cements
【摘要】:
【中国标准分类号】:Q13
【国际标准分类号】:91_100_10
【页数】:6P;A4
【正文语种】:英语