Brabender batch mixer

Figure 4.9 Number average molecular weight of the nan-reacted polyamide (open symbols) and of the reacted polyamide (full symbols) versus mixing time for PA 6/EP-g-MA blends mixed at 7Srpm and 240 °C in a Brabender batch mixer...

Figure 4.17 Conversion of the amine groups of PA6 versus the EP-g-MA weight fraction in PA6/EP-g-MA blends mixed for 2 min at 240 C at 10, 30 and 75rpm in a Brabender batch mixer...

Fig. 10.3 SEM photo of 15 % PET/LCP blend mixed in a Brabender batch mixer at (a) 30 rpm, (b) 60 rpm, and (c) 90 rpm. The spherical particles in (a, b) are LCP dispersed phase. The average sizes of the LCP particles in (c) are less than 2 pm. The arrows show the LCP particles Note the reduction in size with increasing mixing speed, from a macro scale (a) to a micro scale (c)...

Polypropylene clay composites were prepared by melt mixing in a Brabender batch mixer (PL2000, C.W. Brabender) at 50 rpm and 180°C. Clays were added at... 

Polypropylene is melt mixed with an organic peroxide and maleic anhydride using a Brabender, Banbtuy, or twin-screw mixer to graft anhydride ftmctionality on the polymer. The components could be blended together and fed to either a batch mixer or continuous mixer or the polymer is melted first and then the maleic anhydride and peroxide are added in that order. The unreacted maleic anhydride is removed before use. 

The larger batches, each weighing 275.35 g, were mixed in a Brabender Prep Mixer measuring head, electrically heated, air cooled, with stock temperature thermocouple, fitted with Banbury-type rotors) at 40 rpm. The start-up procedure was similar to that used with the smaller mixing head however, the amount of masticated rubber temporarily removed from the mixer (to make room for the addition of the bulky carbon black) was scaled up from 10 g (taken from the 70-g batch) to 40 g. Fatigue resistance was measured by the Monsanto Fatigue to Failure Tester (ASTM D 4482). 

Wojtowicz (in print) reports on mixing tests performed in a two-bladed counterrotating batch mixer (Do-Coder E330, Brabender OHG, Germany) interfaced with... 

One of the most successful mixers used in research laboratories is the internal batch mixer (Thermo-Haake Corp., Karlsruhe, Germany and Madison, WI, and Brabender, South Hackensack, New Jersey both produce versions of this mixer). This mixer produces structures similar to those created when the material is later processed by conventional industrial methods such as twin-screw extrusion. This mixer requires an approximate sample mass of 50g, which may be quite excessive for newly synthesized or specialty materials. Therefore, we created and tested a miniature version of this mixer. 

The HDPE, cellulose fibres, and HDPE-MA were blended at the setting temperature of 140 °C and 60 rpm for 10 minutes using a batch mixer (Model 6, C.W.Brabender). After the compounding, the melt blends were cooled down to room temperature. The solidified blends were granulated using a granulator (S-10-9, C.W. Brabender). 

Several basic designs of the internal batch-type mixers are available. The most popular are the laboratory mixers manufactured by, e.g., Brabender or Haake, and their homologues on the larger scale manufactured by, e.g., Banbury or Moriyama dispersion mixers. 

Product development work is usually carried out in a pilot plant. Here one can use a small Banbury or a Brabender mixer for a batch process and a small twin-screw mixer or a co-kneader for development work on a continuous process. 

Batches, each weighing 70.00 g, were mixed in an electrically heated Brander mixer-measuring head (with a capacity of 60 to 85 ml, a rotor speed ratio drive-to-driven of 3 2, air cooled, with stock temperature thermocouple, fitted with cam-type rotors) at 40 rpm, with the temperature set points adjusted to 100°C. The mixer-measuring head was coupled to a Brabender electronic torque rheometer. 

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