ASTM G114-14
用于评估氧设施中所用聚合物材料的耐老化性的标准实施规程

Standard Practices for Evaluating the Age Resistance of Polymeric Materials Used in Oxygen Service

被代替

标准号

ASTM G114-14

发布

2014年

发布单位

美国材料与试验协会

替代标准

ASTM G114-21

当前最新

ASTM G114-21

 

 

引用标准

ASTM D1349 ASTM D1708 ASTM D2240 ASTM D2512 ASTM D2863 ASTM D3039/D3039M ASTM D3045 ASTM D395 ASTM D412 ASTM D4809 ASTM D638 ASTM G125 ASTM G126 ASTM G63 ASTM G72 ASTM G74 ASTM G86 MIL-PRF-27210

适用范围

5.1 This practice allows the user to evaluate the effect of service or accelerating aging on the oxygen resistance of polymeric materials used in oxygen service.

5.2 The use of this practice presupposes that the properties used to evaluate the effect of aging can be shown to relate to the intended use of the material, and are also sensitive to the effect of aging.

5.3 Polymeric materials will, in general, be more susceptible than metals to aging effects as evidenced by irreversible property loss. Such property loss may lead to catastrophic component failure, including a secondary fire, before primary ignition or combustion of the polymeric material occurs.

5.4 Polymers aged in the presence of oxygen-containing media may undergo many types of reversible and irreversible physical and chemical property change. The severity of the aging conditions determines the extent and type of changes that take place. Polymers are not necessarily degraded by aging, but may be unchanged or improved. For example, aging may drive off volatile materials, thus raising the ignition temperature without compromising mechanical properties. However, aging under prolonged or severe conditions (for example, elevated oxygen concentration) will usually cause a decrease in mechanical performance, while improving resistance to ignition and combustion.

5.5 Aging may result in reversible mass increase (physisorption), irreversible mass increase (chemisorption), plasticization, discoloration, loss of volatiles, embrittlement, softening due to sorption of volatiles, cracking, relief of molding stresses, increased crystallinity, dimensional change, advance of cure in thermosets and elastomers, chain scissioning, and crosslinking.

5.6 After a period of service, a material’s properties may be significantly different from those when new. All materials rated for oxygen service should remain resistant to ignition and combustion (primary fire risk). Furthermore, all materials rated for oxygen service should be resistant to oxidative degradation and retain relevant physical and mechanical properties during service, because part failure can indirectly lead to an unacceptable ignition or combustion risk (secondary fire risk).

5.7 In cases where aging makes a material more susceptible to fire or causes significant oxidative degradation, aging tests may be used to evaluate whether the material will become unacceptable during service. In cases where aging makes a material less susceptible to fire, aging tests may be used to evaluate whether a material can be conditioned (artificially aged) to prolong its service lifetime.

5.8 Oxygen resistance as determined by this practice does not constitute grounds for material acceptability in oxygen service. Determination of material acceptability must be performed within the broader context of review of system or component design, plausible ignition mechanisms, ignition probability, post-ignition material properties, and reaction effects such as are covered by Guide G63.

5.9x00a0......

【收藏】16种橡胶的化学组成、性能特点及主要用途大汇总

可用作臭氧发生器上的密封材料，制造耐油密封件、电线电缆包皮以及耐油橡胶制品和化工衬里。15、氯醚橡胶（CO\\ECO） 由环氧氯丙烷均聚或由环氧氯丙烷与环氧乙烷共聚而成的聚合物。 特点是耐脂肪烃及氯化烃溶剂、耐碱、耐水、耐老化性能极好，耐臭氧性。可用作胶管、密封件、薄膜和容器衬里、油箱、胶辊，制造油封、水封等。16、氯化聚乙烯橡胶（CM或CPE） 是聚乙烯通过氯取代反应制成的具有弹性的聚合物。...

【材料课堂】16种橡胶的化学组成、性能特点及主要用途

可用作臭氧发生器上的密封材料，制造耐油密封件、电线电缆包皮以及耐油橡胶制品和化工衬里。15、氯醚橡胶（CO\\\\ECO） 由环氧氯丙烷均聚或由环氧氯丙烷与环氧乙烷共聚而成的聚合物。 特点是耐脂肪烃及氯化烃溶剂、耐碱、耐水、耐老化性能极好，耐臭氧性、耐蛐越舭と刃浴⑵苄愿摺H钡闶乔苛系汀⒌越喜睢⒌缇敌圆涣肌J褂梦露确段В涸迹?0℃~＋140℃。...

【涨姿势】橡胶与橡胶材料检测知多少

可用作臭氧发生器上的密封材料，制造耐油密封件、电线电缆包皮以及耐油橡胶制品和化工衬里。 15、氯醚橡胶（CO\\ECO） 由环氧氯丙烷均聚或由环氧氯丙烷与环氧乙烷共聚而成的聚合物。 特点是耐脂肪烃及氯化烃溶剂、耐碱、耐水、耐老化性能极好，耐臭氧性、耐蛐越舭と刃浴⑵苄愿摺H钡闶乔苛系汀⒌越喜睢⒌缇敌圆涣肌J褂梦露确段В涸迹?0℃~＋140℃。...

SGS遮阳系列产品测试服务方案

适当晒晒太阳，对身体有一定好处，但如果长时间在阳光中暴晒，容易对身体造成负担，诱发疾病。因此，合格、有效的遮阳产品非常重要。作为国际公认的测试、检验和认证机构，SGS可提供遮阳系列产品测试服务。SGS遮阳系列产品测试服务基于欧美及加拿大对于室内窗帘的标准要求，SGS可以对产品结构进行安全性能和使用性能评估，并评估相应安全装置是否能避免小朋友伤害。...