SH/T 1826-2019 in English

VALID

Plastic-Determinaton of entalpy of fion, degee of crystallinit and meltng temprature of ultra-h -mole weigt plyetylene (PE-U ) mater and prouct-D erental sanning calorimetry(DSC)

Issued on:2019-12-24
Implemented on:2020-07-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $210.00
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Standard No:	SH/T 1826-2019
Document status:	VALID
Title in English:	Plastic-Determinaton of entalpy of fion, degee of crystallinit and meltng temprature of ultra-h -mole weigt plyetylene (PE-U ) mater and prouct-D erental sanning calorimetry(DSC)
Title in Chinese:	塑料超高分子量聚乙烯(PE-UHMW)材料和制品熔融焓和结晶度及熔融温度的测定差示扫描量热法（DSC）
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2019-12-24
Implemented on:	2020-07-01
Professional Classification:	SH-Petrochemical
Related Keywords:	ultra-h -mole weigt plyetylene prouct-d erental sanning calorimetry meltng temprature core test methods parameters test conditions accuracy requirements melting enthalpy excellent wear resistance melting peak temperature
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crystallinity include Polyethylene test crystallinity Ultra high molecular weight polyethylene material Methods for Measuring Polymer Crystallization How to measure polymer crystallization Standard melting enthalpy of propylene How to calculate crystallinity Methods for measuring polymer crystallization: sh/t3018-2019 Melting temperature is higher than standard value Standard melting enthalpy of polyethylene wax High temperature melting related regulations sh/t3205-2019 Standard melting enthalpy of plastics Standard enthalpy of melting of iron gost 1826-2019

本标准规定了差示扫描量热法（DSC）测定超高分子量聚乙烯（PE-UHMW）材料和制品熔融焓、熔融温度的试验方法，以及结晶度的计算方法。
本标准适用于粉料、成型后的材料、成品或使用过的PE-UHMW，也适用于经辐照或化学交联的PE-UHMW。

Introduction

Standard Technical Background

This standard was first published in 2019, filling the gap in the standard of thermal analysis of PE-UHMW materials in my country. Compared with ASTM F2625-10, this standard specifically adds the applicable instructions for irradiated/chemically cross-linked materials.

Core Test Methods

Parameters	Test Conditions	Accuracy Requirements
Melting Enthalpy	10℃/min heating to 200℃	Repeatability≤5.97kJ/kg
Crystallinity	Theoretical value 293.0kJ/kg basis	Rounded to 0.1%
Melting Temperature	Extrapolated Onset Method	±0.21℃

Key Implementation Points

Specimen Preparation Specifications

For products with a thickness of ＞0.25mm, it is necessary to use low temperature cutting to prepare samples to avoid thermal effects. Materials containing additives need to deduct the mass of the additives to calculate the mass of the polymer matrix.

Heat History Treatment

Raw material testing uses secondary heating data (eliminating processing history), and product testing uses first heating data (retaining processing effects).

Technology Evolution Comparison

The new version of the standard updates the 100% crystallization theoretical melting enthalpy from 289.3kJ/kg to 293.0kJ/kg, which is consistent with the latest research results. The test precision reaches the ASTM equivalent level:

Repeatability of melting enthalpy RSD≤3.72%
Reproducibility of crystallinity RSD≤8.56%

Application Cases

Test results of a medical PE-UHMW joint material show:
Crystallinity 62.3% → Material has excellent wear resistance
Melting peak temperature 136.2℃ → Processing temperature window reference

More samples: JGJ 94-2008 YD/T 3934-2021 DL/T 5154-2012

Sample only — not a preview of SH/T 1826-2019

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