Influence of the Processes Parameters on the Properties of The ...
Influence of the Processes Parameters on the Properties of The ...
Influence of the Processes Parameters on the Properties of The ...
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Chapter 4.<br />
Experimental Procedures and Protocols for Analyses<br />
Figure 4.4: AFNOR and ASTM 3 ½ in diameter sieves.<br />
1.3 Mixing <str<strong>on</strong>g>of</str<strong>on</strong>g> Polymer Powder with Fillers<br />
1.3.1 Simple Mixing <str<strong>on</strong>g>of</str<strong>on</strong>g> Polymer Powder with Fillers<br />
After obtaining polymer powder <str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>the</str<strong>on</strong>g> desired particle size, it was mixed with <str<strong>on</strong>g>the</str<strong>on</strong>g> filler by using a<br />
magnetic stirrer. <strong>The</strong> polymer powder and filler were weighed and placed in a plastic jar al<strong>on</strong>g an<br />
appropriate size (1, 2, 3 cm) magnetic bar. <strong>The</strong> powder was mixed for 10 minutes for perfect mixing.<br />
Schematic flow sheet <str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>the</str<strong>on</strong>g> procedure is shown in Figure 4.5.<br />
Sieved polymer<br />
powder<br />
Gloves<br />
Spatula<br />
B<br />
Polymer mixed<br />
matrix<br />
Balance<br />
C<br />
D<br />
E<br />
Filler<br />
A<br />
Mixing jar<br />
Magnet agitator<br />
Magnet bars<br />
Stop watch<br />
Figure 4.5: Magnetic stirrer mixing for composite materials.<br />
1.3.2 Co-grinding in <str<strong>on</strong>g>the</str<strong>on</strong>g> Tumbling Ball Mill<br />
Multi step processing has been used for fibrous polymers. First, <str<strong>on</strong>g>the</str<strong>on</strong>g> polymer fibres were reduced<br />
into small fibres using knife mill. <strong>The</strong>n co-grinding process was applied when polymers were under a<br />
powder form. Thus, <str<strong>on</strong>g>the</str<strong>on</strong>g> polymer powder and <str<strong>on</strong>g>the</str<strong>on</strong>g> filler particles and/or adjuvants (wax, hyalur<strong>on</strong>ate acid)<br />
were introduced in <str<strong>on</strong>g>the</str<strong>on</strong>g> chamber <str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>the</str<strong>on</strong>g> tumbling ball mill in proporti<strong>on</strong> defined by chosen design <str<strong>on</strong>g>of</str<strong>on</strong>g><br />
experiment. <strong>The</strong> same procedure as <str<strong>on</strong>g>the</str<strong>on</strong>g> <strong>on</strong>e presented in secti<strong>on</strong> 1.1.2 for a single product was <str<strong>on</strong>g>the</str<strong>on</strong>g>n applied.<br />
Finally, agglomerates may be found after drying and it was necessary to post-ground <str<strong>on</strong>g>the</str<strong>on</strong>g><br />
composites and to crush <str<strong>on</strong>g>the</str<strong>on</strong>g> agglomerates. 30 sec knife mill grinding followed by 10 min in <str<strong>on</strong>g>the</str<strong>on</strong>g> mortar were<br />
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