ISO/TR 9372-1993 塑料聚氨酯的基底材料甲苯二异氰酸盐中2.4-和2.6-异构体含量的红外光谱法测定
时间:2024-05-17 17:46:52 来源: 标准资料网 作者：标准资料网 阅读：8320
【英文标准名称】:Plastics;basicmaterialsforpolyurethanes;determinationoftheamountsof2,4-and2,6-isomersintoluenediisocyanatebyinfraredspectroscopy
【原文标准名称】:塑料聚氨酯的基底材料甲苯二异氰酸盐中2.4-和2.6-异构体含量的红外光谱法测定
【标准号】:ISO/TR9372-1993
【标准状态】:作废
【国别】:国际
【发布日期】:1993-04
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC61
【标准类型】:()
【标准水平】:()
【中文主题词】:化学分析和试验;塑料;红外线光谱法;含量测定;基底材料;异氰酸酯;聚氨酯
【英文主题词】:polyurethane;isocyanates;infraredspectroscopy;plastics;basematerials;determinationofcontent;chemicalanalysisandtesting
【摘要】:Theprincipleofthemethodispreparingacyclohexanesolutionofthesampletobeanalyzed,measuringtheabsorbanceforthe810cmand782cmbandswhicharecharacteristicofthe1,2,4-and1,2,6-positionsonthearomaticring,andcalculatingtheabsorbanceratio.Appliestomixturescontaining5%to95%ofthe2,4-isomer.
【中国标准分类号】:G31
【国际标准分类号】:
【页数】:7P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 双面蓝色复写纸 |
| 中标分类： |
轻工、文化与生活用品 >>
造纸 >>
纸 |
| 发布日期： | |
| 实施日期： | 1982-04-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 4页 |
适用范围
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所属分类： 轻工 文化与生活用品 造纸 纸
Product Code:SAE J1058
Title:Standard Sheet Steel Thickness
Issuing Committee:Sheet And Strip Steel Committee
Scope:This SAE Recommended Practice provides an orderly series for designating the thickness of unocated and coated hot-rolled and cold-rolled sheet and strip. This document also provides methods for specifying thickness tolerances.Requirements of industry permit leeway in the choice of thickness in some instances, but it is recognized that for many applications, particularly the tonnage requirements of the mass production industries, thickness is normally determined by critical engineering design or manufacturing considerations. However, for general applications or where requirements permit some latitude in the selection of thickness, the preferred thickness given in Table 1 will facilitate interchangeability of different metals in design, reduce inventory, and increase the availability in warehouse stocks of thicknesses commonly required for general applications.All of the thicknesses listed are not necessarily produced in all metals and grades. Producers or distributors must be consulted to determine availability of a particular thickness for a given metal product.