BS ISO 6235-2016 en_9632 Rubber raw Determination of block polystyrene content Ozonolysis method《生橡胶 嵌段聚苯乙烯含量的测定 臭氧分解法》.pdf
《BS ISO 6235-2016 en_9632 Rubber raw Determination of block polystyrene content Ozonolysis method《生橡胶 嵌段聚苯乙烯含量的测定 臭氧分解法》.pdf》由会员分享,可在线阅读,更多相关《BS ISO 6235-2016 en_9632 Rubber raw Determination of block polystyrene content Ozonolysis method《生橡胶 嵌段聚苯乙烯含量的测定 臭氧分解法》.pdf(14页珍藏版)》请在麦多课文档分享上搜索。
1、BS ISO 6235:2016 Rubber, raw Determination of block polystyrene content Ozonolysis method BSI Standards Publication WB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 6235:2016 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 6235:2016. The UK part
2、icipation in its preparation was entrusted to Technical Committee PRI/50, Raw materials (including latex) for use in the rubber industry. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary
3、provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016. Published by BSI Standards Limited 2016 ISBN 978 0 580 92746 1 ICS 83.040.10 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard wa
4、s published under the authority of the Standards Policy and Strategy Committee on 30 September 2016. Amendments/corrigenda issued since publication Date Text affectedBS ISO 6235:2016 ISO 2016 Rubber, raw Determination of block polystyrene content Ozonolysis method Caoutchouc brut Dosage du polystyrn
5、e squenc Mthode de lozonolyse INTERNATIONAL STANDARD ISO 6235 Third edition 2016-09-15 Reference number ISO 6235:2016(E)BS ISO 6235:2016ISO 6235:2016(E)ii ISO 2016 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no
6、part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member
7、 body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.orgBS ISO 6235:2016ISO 6235:2016(E)Foreword iv 1 Scope . 1 2 Normative references 1 3 Principle 1 4 Reaction
8、s 1 5 Reagents 2 6 Apparatus . 2 7 Sample preparation . 2 7.1 General . 2 7.2 Latex . 3 7.3 Oil-extended solid rubber 3 8 Procedure. 3 9 Expression of results 4 10 Test report . 4 Bibliography 5 ISO 2016 All rights reserved iii Contents PageBS ISO 6235:2016ISO 6235:2016(E) Foreword ISO (the Internat
9、ional Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has bee
10、n established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical stand
11、ardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accorda
12、nce with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details
13、of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endor
14、sement. For an explanation on the meaning of ISO specific terms and expressions related to conformit y assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.htm
15、l. The committee responsible for this document is ISO/TC 45, Rubber and rubber products, Subcommittee SC 3, Raw materials (including latex) for use in the rubber industry. This third edition cancels and replaces the second edition (ISO 6235:1995), of which it constitutes a minor revision with the fo
16、llowing changes. the Normative References have been updated; in 7.2, the text in ISO 4655:1985, 4.4 has been included, because this International Standard has been withdrawn; a Bibliography has been added.iv ISO 2016 All rights reservedBS ISO 6235:2016INTERNATIONAL ST ANDARD ISO 6235:2016(E) Rubber,
17、 raw Determination of block polystyrene content Ozonolysis method WARNING Persons using this International Standard should be familiar with normal laboratory practice. This International Standard does not purport to address all of the safety problems, if any, associated with its use. It is the respo
18、nsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. 1 Scope This International Standard specifies a method for the determination of the long polystyrene block content of raw uncompounded styrene-butadiene rubber
19、 (SBR) and raw uncompounded blends of block SBR. It is not applicable to blends of block SBR with EPDM, IIR, CSM and other halogenated rubbers. The method is applicable to raw, uncompounded latices of the above compositions and is suitable for rubbers having block polystyrene contents in the range f
20、rom 5 % (by weight) to 100 % (by weight). Rubbers having block polystyrene contents of less than 5 % (by weight) may yield incorrect results unless a correction factor, based on information gained by working with such rubbers, is applied. The method is intended for use on gel-free rubbers, but it ma
21、y be used on rubbers containing gel if it has been proved that the gel does not interfere. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies.
22、 For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1407, Rubber Determination of solvent extract ISO 4793, Laboratory sintered (fritted) filters Porosity grading, classification and designation 3 Principle A test portion is dissolved in dic
23、hloromethane and the ethylenic bonds in the rubber ruptured by reaction with ozone. The ozonides thus formed are subsequently decomposed by methanolic sulfuric acid solution. 4 Reactions The reactions upon which the method is based are as follows. a) Long, saturated, polystyrene blocks are not attac
24、ked by ozone, but small fragments (aldehydes and carboxylic acids) produced by the ozonolysis and the relatively low molecular mass polystyrene fragments from scission within the random copolymer blocks are soluble in methanolic sulfuric acid solution. b) Relatively high molecular mass polystyrene b
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
5000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- BSISO62352016EN_9632RUBBERRAWDETERMINATIONOFBLOCKPOLYSTYRENECONTENTOZONOLYSISMETHOD 橡胶 聚苯乙烯 含量 测定 臭氧

链接地址:http://www.mydoc123.com/p-391095.html