MIL-PRF-89020B (NOTICE 1)
时间:2024-05-04 15:52:17 来源: 标准资料网 作者：标准资料网 阅读：8462
MIL-PRF-89020B (NOTICE 1), PERFORMANCE SPECIFICATION: DIGITAL TERRAIN ELEVATION DATA (31 MAR 2004)., The purpose of this notice is to inform users of the change in name of the preparing activity from the National Imagery and Mapping Agency (NIMA) to the National Geospatial-Intelligence Agency (NGA), effective 24 October 2003.
【英文标准名称】:Rubber-Identificationofacceleratorsincuredanduncuredcompounds
【原文标准名称】:橡胶硫化和未硫化物中促进剂的鉴别
【标准号】:ISO10398-1998
【标准状态】:现行
【国别】:国际
【发布日期】:1998-07
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC45
【标准类型】:()
【标准水平】:()
【中文主题词】:化学分析和试验;橡胶;含量测定;识别;催速剂(化学);气相色谱法;硫化橡胶
【英文主题词】:Accelerators(chemical);Chemicalanalysisandtesting;Determinationofcontent;Gaschromatography;Identification;Rubber;Rubbercompounds;Vulcanizatedrubber;Vulcanizationaccelerators
【摘要】:1ThisInternationalStandardspecifiesmethodsusinggaschromatography(GC)andthinlayerchromatography(TLC)fortheseparationandidentificationofthefollowingclassesofacceleratorsinvulcanizedandunvulcanizedcompounds:—thiazoles—sulfenamides—thiuramsanddithiocarbamates—guanidines—dithiodimorpholine2When2-mercaptobenzothiazole(MBT)isidentifiedandnosulfenamidesarepresent,itisnotpossibletoestablishiftheoriginalacceleratorwasMBTand/oritssaltsor2,2'-dibenzothiazoledisulfide(MBTS)aseachoftheseacceleratorsmaybeproducedfromtheothersduringthevulcanizationprocess.3Whensulfenamidesareidentified,itisnotpossibletoestablishifMBTand/oritssaltsandMBTSarepresentastheseacceleratorsmaybeproducedfrom2-mercaptobenzothiazolesulfenamidesduringthevulcanizationprocess.4Themethodsdonotdistinguishthiuramsanddithiocarbamatesderivedfromthesameamines.5Fromthemorpholineidentificationitisnotpossibletodetermineiftheinitialacceleratoris2-morpholinothio-benzothiazole(MBS)ordithiomorpholineasmorpholinemaybeformedfromMBSanddithiodimorpholineduringthevulcanizationprocess.6Theseparationofacceleratorcompoundsfromunvulcanizedcompoundsisrelativelystraightforwardwhereasseparationfromvulcanizedcompoundsisdifficultduetothelesserabilityofsolventstopenetratethevulcanizedmatrix.7SomecompoundingingredientsmayinterferewithmethodB.InsuchcasesmethodsAorCshallbeused.
【中国标准分类号】:G34
【国际标准分类号】:83_060
【页数】:11P;A4
【正文语种】:英语
【英文标准名称】:Officefurniture;officeswivelchairs;safetyrequirements,testing
【原文标准名称】:办公室家具.带或不带扶手的可调靠背的办公转椅.安全技术要求.检验
【标准号】:DIN4551-1973
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:Y80
【国际标准分类号】:
【页数】:
【正文语种】: