The instrumentation at the service of materials

Matériau Ingénierie combines the indispensable skills needed to develop, manufacture and maintain the testing solutions that we offer.

Rheotech TR
Characterization of geltime kinetics of thermosetting resins
ISO 2535
ASTM D7029
DIN 16945
  • Characterization of a crosslinking resins
  • Successor Trombomat / Trombotech
  • Optimized measurement conditions

The RheotechTR is the successor of Trombotech (Trombomat), method fully agree with ISO 2535.

This version is dedicated to the control of curable resins (and any other material having a phase liquid / solid transition marked) laboratory and manufacturing. It allows to determine reliably and without damaging the measuring system the characteristic points of a crosslinking resin.

The results given by the RheotechTRQC are: the gel time (viscosity), conventional and thermal reactivity, the exothermic peak, and some other job characteristics.

This new version includes, among other innovations, and also a new design, the rise/fall of the sensor is driven by computer, fully integrated accessories (recirculation tank for better temperature control of the sample, for example).

The XP version is the advanced version of the family RheotechTR proposed by Materiau Ingénierie. With his experience in this field, our development department has developed new products on the same rheometer RheotechTR range of base, this version "expert" to the research and development teams who need a more flexible and more accurate material as standard equipment.

This version comes with accessories for the characterization of thin resin layer in the form of foam, etc. These accessories are present: a thermo Peltier effect (0 ° C - 80 ° C) plate, a precise positioning sensor integrated in the sensor. Other accessories are planned in the coming months.

List of publications where the instrument is quoted

P. Gauthier, S. Aiache, J.M. Aiache*. International Journal of Cosmetic Science 18, 229-235 (1994). [lien].

G. Boutevin, B. Ameduri, J.J. Robin, B. Boutevin*, J.P. Joubert. Polymer Bulletin 44 (2000) 239-246. [link].

B. George*, Y. Grohens, F. Touyeras, J. Vebrel. International Journal of Adhesion & Adhesives 20 (2000) 245-251. [link]. 

M. J. M. Abadiz, K. Mekhissi, P. J. Burchill. Journal of Applied Polymer Science, Vol. 84, 1146–1154 (2002). [link]. 

G. Colomines, F. Rivas, M.-L. Lacoste, J.-J. Robin*. Macromol. Mater. Eng.(2005), 290, 710–720. [link]. 

F.X. Perrin *, T. M. H. Nguyen, J.L. Vernet. European Polymer Journal 43 (2007) 5107–5120. [link]. 

F.X. Perrin, T. M. H. Nguyen, J.-L. Vernet. Macromol. Chem. Phys. (2007), 208, 718–729. [link].

Handbook of Polymer Blends and Composites 2002 – 9.7.1- Measurements of gel times pp 376-377.

E. Darroman, N. Durand, Bernard Boutevin,  S. Caillol*, Progress in Organic Coatings, Vol. 83 (2015) 47-54. [link].

A. Morel, N. Mantrand, S. Belaid, M. Lopez, D. Chereau, C. Demaille, S. Pailler, F. Valter, O. Galet, J. Gueguen, R. Kapel, A. Pezzi, F. Guarrigue*, Oilseeds & fats Crops and Lipids 23 (2016), D408 []


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    Generally the liquid/solid transitions have kinetics heavily dependent of the sample thickness. For example in the case of exothermic reactions a large thickness will cause various phenomena :

    •       Low heat dissipation into the environment due to a surface / volume relatively low ;
    •       A thermal barrier effect, considered materials are usually poor conductors.

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    So that the device can match the maximum of standards, we have developed new accessories and we add additional features to our software incorporating the specific working methods and the corresponding data processing methods.

    The first two standards that we have chosen to integrate into the RheotechTR are the ASTM D7029-04 and theDIN 16945 standards. They refer both to the measurement of the gel time by monitoring the temperature curve.


    ASTM D7029-04 Test Method for Determination of Reactivity of Unsaturated Polyesters and Vinyl Esters at 180 ° F [82.2 ° C] recommends the use of a test tube in borosilicate glass with a diameter of 19 mm iand a thermocouple J with a thicness of 3 mm, the latter being guided by a part facilitating its centering in the test tube. The tests are carried out in a bath at 82.2 ° C. Data from this trial are:

    - the gel time : the time for the resin temperature to go from 65,5°C to 78,8°C ;

    - the cure time : the time between 65,5°C and the maximum temperature ;

    - the interval time : the time between 78,8°C and the maximum temperature ;

    - the peak exotherm i.e. the maximum temperature.



    The method described in Section 6.2 of DIN 16 945 Testing of resins, hardeners and accelerators, and catalyzed resins is based on a similar principle. This method is recommended for epoxy resins, polyester resins, polyurethane resins and acrylic resins. The thermocouple used in this case is a thermocouple J of 1 mm diameter. The data from this test are the following:

    - the gel time : the time for the resin temperature to go from a first temperature T0 to a second temperature T1 ;

    - lthe cure time : the time between Tand the maximum temperature ;

    - the peak exotherm i.e. the maximum temperature.

    (T0 and Tdepend on the studied resin. These temperatures are indicated in the standard).


    If you want to use the RheotechTR with other standards for measuring the gel time, please contact us specifying the number of the standard and the treatments you would like to use at the following address:  This email address is being protected from spambots. You need JavaScript enabled to view it. .

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