ISO 182-4:1993 PDF

Plastics — Determination of the tendency of compounds and products based on vinyl chloride homopolymers and copolymers to evolve hydrogen chloride and any other acidic products at elevated temperatures — Part 4: Potentiometric method

Open preview (PDF)

Title (English):

ISO 182-4:1993

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 14
Publication date:: March 25, 1993
Edition:: ISO IS 182 edition 1 version 1
ICS:: 83.080.20

Delivery type:

Full version25 €Read online 24h10 €Read online 72h15 €

Document language:

enru

Delivery time:Immediate download

Price:25 €

Description (English):

The principle of the method is maintaining a test portion of the PVC at an agreed temperature in a nitrogen gas stream, absorbing the hydrogen chloride evolved in a given amount of an appropriate solution, and potentiometrically determining the amount of hydrogen chloride evolved in relation to the recorded change in pCl of the absorbing solution. The method is recommended for compounded PVC materials and products only, although it can be used for polymers in powder form under appropriate conditions.

Technical details

Technical committee: ISO/TC 61/SC 9 - Thermoplastic materials
SKU: ISO 182-4:1993

Abstract

Overview

ISO 182-4:1993 specifies the potentiometric method for determining the tendency of PVC (vinyl chloride homopolymers and copolymers) compounds and products to evolve hydrogen chloride (HCl) and other acidic products at elevated temperatures. The method measures chloride ion concentration (reported as pCl) in an absorbing solution while a test portion is heated in a nitrogen gas stream. It is mainly recommended for compounded PVC materials and products, including plasticized and colored formulations, and can be adapted for powders under agreed conditions.

Key topics and requirements

Principle: maintain a test portion at an agreed elevated temperature in a dry nitrogen stream, absorb evolved HCl in a measured solution, and determine HCl by potentiometric pCl measurement.
Essential apparatus and reagents:
- Dehydrochlorination cells (re-usable Cell A or disposable Cell B), heating oil bath (170–210 °C range), measurement cell, stirrer, flowmeter.
- Specific chloride electrode (AgCl-based) with a precision of at least 0.01 pCl, and a suitable reference electrode (e.g., calomel or mercurous sulfate) with salt bridge where required.
- Pure nitrogen:

Related standards

Other ISO standards

Overview

Key topics and requirements

Principle: maintain a test portion at an agreed elevated temperature in a dry nitrogen stream, absorb evolved HCl in a measured solution, and determine HCl by potentiometric pCl measurement.
Essential apparatus and reagents:
- Dehydrochlorination cells (re-usable Cell A or disposable Cell B), heating oil bath (170–210 °C range), measurement cell, stirrer, flowmeter.
- Specific chloride electrode (AgCl-based) with a precision of at least 0.01 pCl, and a suitable reference electrode (e.g., calomel or mercurous sulfate) with salt bridge where required.
- Pure nitrogen:

ISO 182-4:1993 PDF

Technical details

Abstract

Overview

Key topics and requirements

Related standards

Abstract

Overview

Key topics and requirements

Related standards

Systems and software engineering — Software life cycle processes

Asset management — Vocabulary, overview and principles

Asset management — Asset management system — Requirements

Information technology — Radio frequency identification device conformance test methods — Part 2: Test method…

Information technology — Multimedia framework (MPEG-21) — Part 22: User Description

Milk — Determination of the lactoperoxidase activity — Photometric method (Reference method)

Carbonaceous materials for the production of aluminium — Cold and tepid ramming pastes — Expansion/shrinkage…

Agricultural machinery — Safety — Part 13: Large rotary mowers