EQUIPMENT | MATERIALS TESTING
Right: The Phoenix DSC system from Netzsch is supported by a range of smart software tools to simplify application
gripper always applies the correct contact force depending on the crucible/lid type. The autosam- pler comes with a RemoveCap feature and option- ally pierces lids for measurements on less-stable samples or samples containing volatile solvents. A motorised tray cover protects samples from dust and atmospheric influences and only opens shortly for autosampler gripper access. After automatically closing the cover, the space above the sample pans is purged by branching gas channels inte- grated into the cover. “Increasing product complexity will always
require reliable testing methods, such as thermal analysis,” says Pflock. “Materials testing measure- ments will continue to provide valuable information that will influence the direction of compounding. Instrument usability and data integration will be the trends for the future.”
Thermo-physical The LFA 500 Light Flash from Linseis has been developed to measure thermal diffusivity, thermal conductivity and specific heat values for up to 18 samples at a time. Information on the thermo-physi- cal properties of materials and heat transfer optimi- sation of final products is becoming increasingly important, says the company, and over the past few decades the flash method has emerged as the most commonly used technique for this application. The Linseis LFA 500 Light Flash is claimed to be
Below: Schematic showing the key elements in the Linseis LFA 500 Light Flash instru- ment for measuring thermal
conductivity
a versatile tool. The sample is positioned on a sample robot, located in a furnace that is main- tained at a predetermined temperature. The lower surface of the sample is then irradiated with a programmed energy pulse (flash lamp) which results in a homogeneous temperature rise at the
sample upper surface. This resulting temperature rise is measured by a high speed IR detector and thermal diffusivity values are computed from temperature versus time data.
Hardness testing Zwick Roell Indentec has launched an updated Rockwell hardness tester, which is suitable for testing a range of hard plastics to internationally recognised standards. The company says the nose-mounted indenter on the new model enables access to and visibility of awkward test points, eliminating the need for time consuming and expensive test sample sectioning. Using closed loop force application, test forces of between 1 kgf and 250 kgf can be em- ployed to cater for both Rockwell and Rockwell Superficial tests on the one machine. Vertical test space is 250mm in standard specification. The company says the instrument provides a high level of test point repeatability and reproduc- ibility and is also capable of performing Brinell tests, where a certified portable microscope is included to measure the indentation. Features include a colour touchscreen user interface, which simplifies the selection of test methods, test configuration and result output to help eliminate potential operator error. Either manual or user defined automatic cyclic testing functions can be selected, with definition of the test number and interval between tests. Measured values can be transferred to the Industry standard TestXpert lll software via a serial port for logging, data archiving and processing. The instrument is supported with a comprehensive range of support anvils and special purpose component holding fixtures.
Polymer characterisation Waters Corporation recently entered into a co-marketing agreement with Malvern Panalytical to extend polymer characterisation options by pairing the
74 COMPOUNDING WORLD | April 2018
www.compoundingworld.com
PHOTO: LINSEIS
PHOTO: NETZSCH
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