Oligomerisation products of alpha-pinene and beta-pinene

Viscosity

Link to relevant study record(s)

Reference

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

key study

Study period:

25 November 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

Study conducted according to OECD 114 guideline, under GLP without deviation and with certificate of analysis included.

Reason / purpose for cross-reference:

reference to other study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

OECD Test Guideline 114 (Viscosity of Liquids)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

2017-01-10

Type of method:

rotational viscometer (dynamic)

Temp.:

20°C

Parameter:

dynamic viscosity (in mPa s)

Value:

871.31

Remarks on result:

other: shear rate = 3.960 s-1

Remarks:

First determination. This value is the mean of 2 measurements.

Temp.:

40°C

Parameter:

dynamic viscosity (in mPa s)

Value:

96.78

Remarks on result:

other: shear rate = 39.60 s-1

Remarks:

First determination. This value is the mean of 2 measurements.

Temp.:

20°C

Parameter:

dynamic viscosity (in mPa s)

Value:

862.32

Remarks on result:

other: shear rate = 3.960 s-1

Remarks:

Second determination. This value is the mean of 2 measurements.

Temp.:

40°C

Parameter:

dynamic viscosity (in mPa s)

Value:

96.83

Remarks on result:

other: shear rate = 39.60 s-1

Remarks:

Second determination. This value is the mean of 2 measurements.

Key result

Temp.:

20°C

Parameter:

dynamic viscosity (in mPa s)

Value:

866.82

Remarks on result:

other: shear rate = 3.96 s-1

Remarks:

Final value

Key result

Temp.:

40°C

Parameter:

dynamic viscosity (in mPa s)

Value:

96.81

Remarks on result:

other: shear rate = 39.6 s-1

Remarks:

Final value

Results:

Results of the pre-test:

Temperature (°C)	Speed (RPM*)	Torque (%)	Shear rate (s-1)	Time (sec)	Dynamic Viscosity (mPa.s)
20.0	0.8	23.1	1.056	120	866.07
20.0	1.4	40.3	1.848	240	863.39
20.0	2.2	63.6	2.904	360	867.09
20.0	3	87.1	3.960	480	870.81

*RPM: Rotation Per Minute

The test item is considered as Newtonian because the difference between the lowest and the highest value is 0.86%. As a reminder, a fluid is considered as Newtonian if the difference between the lowest and the highest value is fewer than 3%.

Main test:

First determination:

Results of the first determination  Temperature (°C) Speed (RPM)  Torque (%)  Shear rate (s-1)  Viscosity (mPa.s)   20.0 3 87.1 3.960  870.81 20.0  3  87.2 3.960  871.81 40.0  30  96.8 39.60  96.78 40.0  30  96.8  39.60  96.78

Second determination:

Results of the second determination  Temperature (°C) Speed (RPM)  Torque (%)  Shear rate (s-1)  Viscosity (mPa.s)   20.0 3  86.1 3.960 860.82  20.0  3  86.4 3.960  863.82  40.0 30  96.8  39.60  96.88  40.0 30  96.8  39.60  96.78

Conclusions:

According to OECD 114 Guideline, the viscosity estimated for the test item is 866.82 mPa.s at 20°C, at the shear rate 3.96 s-1 and 96.81 mPa.s at 40°C, at the shear rate 39.6 s-1.

Executive summary:

A study was performed to determine the viscosity of the test item TERPENIC OLIGOMERS Batch 16 -03 SI. The method followed was designed to be compliant with the OECD Guideline for Testing of Chemicals No. 114, ''Viscosity of Liquids".

In this method, the measurement is performed under different shear conditions.

A rotational viscometer measures the mechanical resistance of a fluid that works opposite the rotational movement of a spindle. A spindle is therefore immersed into the fluid and a rotation is applied through a calibrated spring. The resistance exerted on the spindle is estimated by the spring twist. The spindle shear rate, the spindle size and shape, the fluid container and the full scale of the spring torque determine the measuring range. Under the study conditions, values of viscosity between 1.5 and 300000 mPa.s can be measured.

This technique allows measuring the dynamic viscosity of Newtonian liquids (for which the viscosity does not depend on shear rate or time) and non-Newtonian liquids (for which the viscosity depends on shear rate or time).

A pre-test was firstly performed and allowed classifying the test item as a Newtonian liquid.

Two determinations were then performed.

At 20.0°C, the mean of the two dynamic viscosities obtained is 871.31 mPa.s for the first determination and 862.32 mPa.s for the second. The difference between the two determinations is 1.0% so the average is given as result:

n (20.0°C +/- 0.1, 3.96s^-1) = 866.82 mPa.s

At 40.0°C, the mean of the two dynamic viscosities obtained is 96.78 mPa.s for the first determination and 96.83 mPa.s for the second. The difference between the two determinations is 0.1% so the average is given as result:

n (40.0°C +/- 0.1, 39.6s^-1) = 96.81 mPa.s

Description of key information

The dynamic viscosity of terpenic oligomers was determined to be 866.82 mPa.s at 20°C, at the shear rate 3.96 s^-1 and 96.81 mPa.s at 40°C, at the shear rate 39.6 s^-1 

Key value for chemical safety assessment

Viscosity:

866.82 mPa · s (dynamic)

at the temperature of:

20 °C

Additional information

Well performed study was conducted according to OECD Guideline 114 and under GLP to determine the self-ignition temperature of terpenic oligomers. The result was considered as reliable without restriction.