ASTM D4616-1995(2008)
硬沥青的中间相的测定和反射光作显微分析的标准试验方法

Standard Test Method for Microscopical Analysis by Reflected Light and Determination of Mesophase in a Pitch

标准号

ASTM D4616-1995(2008)

发布日期

1995年

实施日期

废止日期

无

中国标准分类号

E43

国际标准分类号

91.100.50 (Binders. Sealing materials)

发布单位

US-ASTM

适用范围

Sometimes coal tar and petroleum pitches are heat treated thereby forming mesophase spheroids. The mesophase may be partially soluble in quinoline and cannot be estimated by the quinoline insoluble test (Test Method D 2318). This test method provides for the identification, quantitative estimation, and size determination of mesophase spheroids.

The mesophase initially forms as spheroids that may coalesce to form a variety of asymmetrical shapes. The smallest mesophase particle that can be detected with certainty at 400x00D7; or 500x00D7; magnification is 4 x03BC;m in diameter; mesophase particles sizes less than 4 x03BC;m should be ignored. If mesophase material less than 4 x03BC;m in size is of interest, then magnifications of 1000 to 1800x00D7; shall be used and the results should be appropriately identified. This method is limited to determining minor levels of mesophase, that is, x2264;20 % mesophase.

1.1 This test method covers laboratory procedures for the preparation of granular and melted samples for microscopic analysis using reflected light to identify and estimate the amount and size of the mesophase.

1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

ASTM D4616-1995(2008) 中可能用到的仪器设备