Preparation of Polyamide 66-Poss Nanocomposite Fibre.pdf

1、Poly hexamethylene adipamide (PA66) nanocomposites fibres were prepared using octaphenylsilsesquioxane (OPS) and octaaminophenyl polyhedral oligomeric silsesquioxane (OAPS) asfillers.The effects of the composition and th

2、e type of the components on the morphology,mechanical, flow and thermal properties were investigated.During the study PA66 was meltmixed with the two POSS in varying percentages (1, 2, and 3 weight ％) under the sameproce

3、ssing conditions (screw speed, spinning temperature and draw ratio).
　　 Nanocomposites are a new class of mineral-field plastics that contain relatively small amounts(＜10％) of nanometer-sized particles.Production of

4、thermoplastic based nanocompositesinvolves melt mixing the polymer (Polyamide 66, PA66) and nanoparticles (POSS) that havebeen modified with amine terminated benzene group.The modification was achieve in two steps,first

5、by nitration of octa-phenyl POSS to obtain octa-nitrophenyl POSS then subjecting to mildreduction to form octa-aminophenyl POSS.During mixing, polymer chains diffuse from the bulkpolymer into the van der Waals galleries

6、between the POSS interfaces.
　　 FTIR and 1HNMR results showed that the aromatic reduction of ONPS to OAPS using hydrazinehydrate was successful.Mechanical tests, scanning electron microscopy, thermal analysis andrheo

7、logical measurements were used to characterize the nanocomposites.The 1％POSS contentrecorded better results because of the inhibited agglomeration as observed in the SEMmicrographs due higher degrees of particle exfoliat

8、ion.Recrystallization temperature improvedfrom 219℃ for neat PA66 to 225℃ for PA66/POSS composites (1, 2, 3％wt POSS).The onsetdecomposition temperature improves by up to 6℃ with the addition of POSS as indicated byTGA an

9、alysis.Nearly all the mechanical properties of the composite were found to increase withthe POSS loading, tensile modulus and tenacity increased by up to 8％ and 2％ respectively.However, it was seen that 3％ POSS loading d