Page 41 - Plastics News May 2018

FEATURES
FeAtures

4 CONCLUSIONS

Flame retarded self-reinforced polypropylene composites tends to get damaged during processing causing noticeable
were manufactured by injection moulding method for deterioration of the mechanical properties. Based on these
the first time. By this means, besides the conventional results, it can be concluded that unique hybrid composite
processing methods resulting in 2-dimensional SRPC systems can be manufactured by combining polymer
sheets, the production of three-dimensional products fibre reinforcement with other fillers even with injection
becomes also realizable. The elaborated multi-step moulding method, however, by taking into consideration
composite preparation method allowed homogeneous that the beneficial effect of increasing filler content is
dispersion of both hPP fibres and FR particles in the ePP limited by filler-polymer incompatibility and the abrasive
matrix and thus to achieve simultaneous improvement in effect of the used fillers.
mechanical and FR properties. ACKNOWLEDGEMENTS
In the case of the short fibre reinforced injection moulded The research was financially supported by the Hungarian
sheets, the synergistic effect, observed recently between Scientific Research Fund (OTKA K112644 and PD121171).
longer oriented fibres and the intumescent FR system, This work was supported by the National Research,
proved to be rather moderate. Based on these results, Development and Innovation Fund in the frame of
it was concluded that the reinforcing fibre length, fibre NVKP_16-1-2016-0012 and GINOP-2.2.1-15-2016-00015
alignment, and the lay-up (structure) of intumescent flame projects. This research was realized in the frames of
retarded SRPCs are of key importance regarding their fire TÁMOP 4.2.4. A/1-11-1-2012-0001 “National Excellence
performance. Program—Elaborating and operating an inland student and
Nevertheless, it was found that the presence of up to 20% researcher personal support system”. The project was
FR particles in the matrix material does not remarkably subsidized by the European Union and co-financed by the
influence the mechanical performance of the injection European Social Fund. K. Bocz is thankful for the János
moulded composites. At higher loading (30% FR in the Bolyai Research Scholarship of the Hungarian Academy
matrix), however, the structure of the reinforcing PP fibres of Sciences.

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41 May 2018 Plastics News