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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Remarks:
Reliable, company internal data.
Qualifier:
no guideline followed
Principles of method if other than guideline:
Since the resins are liquid at room temperature, the glass transition/melting is measured at sub ambient temperatures using conventional differential scanning calorimetry (DSC).
GLP compliance:
not specified
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
>= -37 - <= -36 °C
Remarks on result:
other: Upon heating, the test substance exhibited glass transition, therefore melting was not observed. The glass transition region was observed at -36 or - 37 °C and the onset of exotherm was observed at 163°C.

DSC results (2 heating runs):

Sample #

Tg (HR1)

Tg (HR2)

Onset of exotherm

DPHA® (#JBHA0020T)

-36°C

-37°C

163°C

Conclusions:
Under the study conditions, DPHA exhibited glass transition, therefore melting was not observed. The glass transition temperature was evaluated as -37 or - 36 °C. Further, the onset of exotherm was observed at the temperature of 163°C.
Executive summary:

A study was conducted to determine the melting point of test substance, DPHA using the differential scanning calorimeter (DSC). Under the study conditions, the test substance exhibited glass transition, therefore melting was not observed. The glass transition temperature was evaluated as -37 or - 36 °C. Further, the onset of exotherm was observed at the temperature of 163°C (Herssens, 2010).

Description of key information

The glass transition temperature of the test substance was determined using differential scanning calorimetry (DSC) (Herssens, 2010).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-37 °C

Additional information