SAE AS398 Direction Instrument, Magnetic, Non-Stabilized Type (Magnetic Compass)
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来源:标准资料网
Product Code:SAE AS398
Title:Direction Instrument, Magnetic, Non-Stabilized Type (Magnetic Compass)
Issuing Committee:A-4 Aircraft Instruments Committee
Scope:This Aeronautical Standard covers two basic types of instruments as follows: Type I - Direct ReadingType II - Remote Indicating
【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
基本信息
| 标准名称： | 中小型船舶导流管装配工艺 |
| 中标分类： |
船舶 >>
船舶综合 >>
船舶工艺 |
| 发布日期： | |
| 实施日期： | 1961-10-31 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
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所属分类： 船舶 船舶综合 船舶工艺
