Significance and Use
7.1 Ash content gives an estimate of the inorganic content of cellulose ester samples. The presence of high levels of inorganic content (ash) can be detrimental to the melt stability and optical clarity of a cellulose ester in melt processing or act as a potential source of insolubles when the ester is used in solution.
1. Scope
1.1 These test methods cover procedures for the testing of cellulose acetate propionates and acetate butyrates. These esters may vary widely in composition and properties, so certain of the procedures can be used only in the ranges of composition where they are suitable.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 The test procedures appear in the following sections:
| | Sections |
| Acetyl Propionyl or Butyryl Contents | 28-37 |
| Acetyl Content, Apparent | 18-27 |
| Acidity, Free | 12-17 |
| Ash | 7-10 |
| Color and Haze | 77-81 |
| Heat Stability | 57-65 |
| Hydroxyl Content | 38-44 |
| Hydroxyl Content, Primary | 46-50 |
| Intrinsic Viscosity | 67-71 |
| Moisture Content | 5-6 |
| Sulfur or Sulfate Content | 51-56 |
| Viscosity | 74-75 |
| Limiting Viscosity Number | 67-71 |
1.4 This standard does not purport to address 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.
2. Referenced Documents (purchase separately) 
The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D618 Practice for Conditioning Plastics for Testing
D1343 Test Method for Viscosity of Cellulose Derivatives by Ball-Drop Method
D2929 Test Method for Sulfur Content of Cellulosic Materials by X-Ray Fluorescence
D5897 Test Method for Determination of Percent Hydroxyl on Cellulose Esters by Potentiometric Titration--Alternative Method
Keywords
apparent acetyl; ash; cellulose acetate butyrate; cellulose acetate propionate; cellulose esters; color; free acidity; haze; hydroxyl; limiting; partition; sulfate content; viscosity;
ICS Code
ICS Number Code 85.040 (Pulps)
DOI: 10.1520/D0817-12
ASTM International is a member of CrossRef.
Citing ASTM Standards
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