ADDITIVES | POLYAMIDES
MultEpPOSS slightly reduced the rheological and mechanical properties after each extrusion cycle. Nonetheless, it was observed that all properties, particularly rheological characteristics, were superior in blends compatibilised with MultEp- POSS compared to both TriEpPOSS-compatibilised and non compatibilised blends, owing to the heightened reactivity of MultEpPOSS toward PA6.
IMAGE: BYK
Above: BYK’s SCONA 12031 N significantly reduces the risk of distor- tion during the injection moulding process
higher yields. The benefits of Nexcircle R801 make it suitable for a wide range of applications includ- ing consumer goods, industrial products, and in particular automotive applications, where the improved mechanical properties and thermal stability is useful when manufacturing more durable and heat-resistant components. In an unrelated but potentially exciting develop-
ment, a study recently published in the journal ACS Omega discussed the challenges involved in recycling complex engineering polymer blends used in the automotive sector. The study explored alterations in the properties of compatibilised PA 6/ TPE blends under multiple thermomechanical recycling conditions, especially for under-hood applications. The compatibilisation of PA 6/TPE blends was achieved through the incorporation of polyhedral oligomeric silsesquioxane (POSS) nanoparticles, specifically utilising variants with three and multiple epoxide functional groups (TriEpPOSS and MultEpPOSS, respectively) in their cage structures. Following each recycling step, the blends were pelletised and injection moulded to characterise their morphological, rheological, mechanical, and thermomechanical properties. The findings revealed that the addition of
TriEpPOSS significantly improved all properties of PA 6/TPE blends throughout successive extrusion cycles. For instance, significant enhancements in Izod impact strength were achieved through the incorporation of TriEpPOSS into the PA 6/TPE blend. The 80PA6/20TPE blend with 1wt% TriEp- POSS demonstrated a remarkable 685% increase in Izod impact strength compared to the same blend without TriEpPOSS following the fourth extrusion cycle. Conversely, the incorporation of
56 COMPOUNDING WORLD | April 2025
Pigment warpage SCONA 12031 N belongs to a new generation of BYK’s extensive SCONA additives family, and addresses the problem of warpage in finished parts caused by certain organic pigments such as phthalocyanine blue. This pigment is synthetic, acicular, and consists of a copper complex. The copper part of the pigment is very polar, while the rest of the molecule is non-polar. Due to these structural properties and its needle-like microstruc- ture, phthalocyanine blue acts like a nucleus in the injection moulding process, propagating oriented crystallisation and thereby promoting warpage. SCONA 12031 N is functionalised with maleic anhydride and is not comparable with convention- al, standardised polyethylene-maleic anhydride products. It forms a bond between the polymer and the pigments, thus ensuring improved disper- sion and compatibility of the pigments in the material. This in turn leads to a significant reduction in the risk of distortion during the injection mould- ing process in the finished component. The use of SCONA 12031 N also offers numer- ous advantages that the company says significantly improves plastics processing. It opens up more possibilities in colouristics so that a wider range of colours and shades can be realised, and enables faster cycle times in injection moulding which increases the efficiency of production processes. Another important benefit is the ability to replace more expensive pigments with cheaper alterna- tives without having to compromise on quality. This not only leads to a reduction in production costs, but also provides greater flexibility in the choice of suppliers.
CLICK ON THE LINKS FOR MORE INFORMATION: �
https://greenchemicals.eu �
www.voelpker.com �
www.clariant.com �
www.lbf.fraunhofer.de �
www.caiadditives.com �
www.ws-chem.com �
https://nexamchemical.com �
www.byk.com �
www.ascendmaterials.com
www.compoundingworld.com
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60
