Presented research is an attempt of prediction of the feed ratio and direction influence on milling inaccuracy.
First problem was how to designate influence of feed ratio on the machining effects in analytical calculations, among large number of other influencing factors.
Comparing the workpieces machined with the same feed ratio but different directions, it can be observed, that conventional milling causes lower deviation values than climb.
shows values and deployment of deviations measured on workpiece machined with the lowest feed ratio with climb milling direction.
For reducing the surface-free energy of SPU coats, AA as diacid unit was better than PA and long chain silicone was worse than short chain silicone when the same molar feed ratio was used.
From Table 4, it was unexpectedly found that the surface-free energy of sample SPU-6 was higher than that of sample SPU-2, indicating that the efficiency of long chain silicone (PDMS1000) was worse than that of short chain silicone (PDMS550) at reducing the surface-free energy of SPU coats when the same molar feed ratio was used.
Additionally, the water uptake of the copolyesters increased with the increase of OLA starting feed ratios.
For the other copolyesters with different [PEG/OLA] starting feed ratios, the weight loss was gradually increased and reached almost about 90% after 3 months.
The decrease of PEG/OLA feed ratio showed disadvantageous influence on the molecular weights of the resulting copolyesters, which is probably due to the extensive transesterification between the polymers with the incorporation of more content of OLA.
Further decreasing of the PEG/OLA feed ratio while maintaining the PET content at 30% led to the increase of [T.
Given a monomer/solvent feed ratio
, the monomer conversion is related to the solution density according to the following expression
The chemical compositions (TPA/FA) of these copolymers, shown in Table 1, are consistent with the feed ratios
of TPA to FA.