ISO 19935-3:2021 Plastics — Temperature modulated DSC —Part 3: Separation of overlapping thermal transitions

标准简介

Plastics — Temperature modulated DSC —Part 3: Separation of overlapping thermal transitions是国际标准化组织(International Organization for Standardization,简称ISO)于2021‑05‑19发布的ISO标准,适用于国际范围。

标准截图

Plastics — Temperature modulated DSC —Part 3: Separation of overlapping thermal transitions
Plastics — Temperature modulated DSC —Part 3: Separation of overlapping thermal transitions(截图)

 

标准文档说明

标准文档类型为Plastics — Temperature modulated DSC —Part 3: Separation of overlapping thermal transitions高清PDF版本(文字版),标准文档内可进行搜索,可以复制原文,可粘贴。

标准部分原文

INTERNATIONAL STANDARD ISO 19935-3:2021

Plastics — Temperature modulated DSC —

Part 3: Separation of overlapping thermal transitions

1 Scope

This document specifies a method for the separation of overlapping thermal transitions of plastics related to reversing and non-reversing heat flow rate, using temperature modulated differential scanning calorimetry.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 472, Plastics — Vocabulary

ISO 113571‑ , Plastics — Differential scanning calorimetry (DSC) — Part 1: General principles

ISO 199351‑ , Plastics — Temperature modulated DSC — Part 1: General principles

ISO 199352‑ :2020, Plastics — Temperature modulated DSC — Part 2: Measurement of specific heat capacity c

p

ISO 80000‑5 , Quantities and units — Part 5: Thermodynamics

3 Terms a nd definiti ons

For the purposes of this document, the terms and definitions given in ISO 472, ISO 113571‑ , ISO 199351 ‑

and ISO 80000‑5 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp

— IEC Electropedia: available at http://www.electropedia.org/

4 Symbols

4.1 Temperature modulation, T(t)

According to ISO 199351‑ .

4.2 Heating rate

According to ISO 199351‑ .

4.3 Heat flow rate, Φ(t)

According to ISO 199351‑ .

ISO 19935-3:2021

5 Principles

According to ISO 199351‑ .

The total heat flow rate signal is separated into a reversing and a non-reversing component by means of modulation of the heating rate. The reversing heat flow rate corresponds to the heat capacity component while the non-reversing heat flow rate corresponds to the kinetic component of the total heat flow rate.

Separation is limited to overlapping effects related to reversing (heat capacity) component and non‑

reversing (kinetic) component, respectively, on the time scale of modulation.

6 Apparatus and materials

The apparatus and materials shall be in accordance with ISO 199351‑ .

7 Calibration

7.1 General

According to ISO 199351‑ .

7.2 Calibration procedure

According to ISO 199352‑ .

7.3 Calibration of modulation amplitude

According to ISO 199351‑ .

7.4 Calibration of phase

According to ISO 199351‑ .

8 Procedure

8.1 General

The procedures of temperature modulated DSC, setting up the apparatus, loading the specimen into the crucibles, insertion of crucibles into the instrument, performing measurements, and removal of crucibles, shall be in accordance with ISO 113571‑ .

8.2 Experimental conditions

According to ISO 199352‑ .

The determination of reversing and non-reversing specific heat capacity shall be done in accordance with ISO 199351‑ .

8.3 Interpretation of results

According to ISO 199351‑ .

8.4 Examples of the results — S eparation of reversing and non-reversing heat flow rate

Figure 1 shows a typical example of quenched polyethylene terephthalate (PET).

网盘链接

百度网盘:https://pan.baidu.com/s/1e0N8RGamxQxSfGwaPm2BSQ
提取码:93vh

【温馨提示】大资料ISO是提供信息发布的专业信息类网站,所有内容均由用户发布,不代表本站观点,本站亦不存储所涉及的文件及资料。如有【免费资料】以及【付费资料】,请用户根据自己的需求,自行判断是否需要获取。如有交易诈骗、内容侵权可发送邮件至kf@dzl100.com,我们审查后若发现情况属实,会立即对相关内容进行删除处理。

加载用时:65.6531 毫秒

相关评论

相关文章