Polymer Reference Book

Chapter 16: Thermal Properties

16.1 Linear Coefficient of Expansion

The curve in Figure 16.1 illustrates a method for determining the expansion coefficient of a polymer.


Figure 16.1: Theromechanical analysis of epoxy printed board material. Measurement of expansion coefficient. (Source Author's own files)

16.1.1 Dilatometric Method

Details of this method are given in Table 16.1.

Table 16.1: Thermal properties of polymers

Method

ATS FAAR Apparatus Code No.

Measurement units

Test suitable for meeting following standards

Notes

Temperature of deflection under load or heat deflection or distribution temperature (Martens Method)

C

ASTM D648-04 [01]

Softening point Vicat

10.01004

10.01009

10.01003

10.01010

10.01041

10.01042

C

ASTM D648-04 [01]

ASTM D1525 [2]

DIN EN ISO 306 [3]

DIN EN ISO 75-1 [4]

DIN EN ISO 75-2 [5]

ISO 75-1 [6]

ISO 75-2 [7]

ISO 75-3 [8]

ISO 306 [9]

UNI EN ISO 75-1 [10]

UNI EN ISO 75-2 [11]

UNI EN ISO 75-3 [12]

UNI EN ISO 306 [13]

Melt flow index (or rate)

1002013

10.02017

ASTM D1238 [14]

ASTM D2116 [15]

ASTM D3364 [16]

UNI EN ISO 1133 [17]

Low temperature embrittlement (or brittleness temperature)

10.12000

10.12006

C

ASTM D746

DIN

ISO

Melting point (Fischer Johns)

070173C

C

ASTM

Also measured from differential thermal analysis peak

Thermal conductivity

w/mk

ASTM C177 [19]

DIN 52612 [20]

Linear expansion coefficient

10.46000

mm/mm cm/cm per C in/in F

ASTM D696-44 [21]

UNI 5284 [22]

Specific heat

kJ Kg 1

ASTM

DIN

Can also be measured by differential scanning calorimetry

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