In situ polymerization of polyamide 66 nanocomposites utilizing interfacial polycondensation. III. Co‐synthesis of silica nanocomposites via sol–gel chemistry

Abstract

In situ co-synthesis of nylon 66 (PA66)-silica nanocomposites can be accomplished through sol-gel chemistry conducted simultaneously with the nylon polymerization. Unfunctionalized silica nanocomposites and bonded silica nanocomposites wherein the inorganic silica phase chemically couples to the nylon polymer through a functionalized silane are generated via the simultaneous initiation of synthesis reactions in the inorganic and organic species. The effects of agitation and water-to-silane molar ratio on the courses of the inorganic and organic reactions and the generated silica morphology in the resulting nanocomposites are investigated using the tools of Brookfield Viscometer, Fourier transform infrared spectroscopy, and transmission electron microscopy. Dynamic mechanical analysis confirms the mechanical reinforcement of the various nanocomposites in relation to their silica content and network morphology.

In Situ Polymerization of Nylon 66/Reduced Graphene Oxide Nanocomposites

“…Along with the fast development of the modern manufacturing industry, the manufacturers and customers have a high requirement on the performance of PA66 products; however, the unmodified PA66 cannot completely meet the demand of the emerging market. To enhance its performance and expand its field of application, various PA66 composites modified with nanofillers have been developed in recent years, such as the carbon nanotube [6,7], nanoclay [1,[8][9][10], and nanoparticles [11,12].…”

Overviews of Synthesis of Nanomaterials

“…The large molecules formation occurs through polymerization; formation of dimer, chain, and ring (as shown in Eqs (2.1)e(2.3)) [43]. Its brief equation is shown as: 2M(OR) (4Àn) (OH) n / (M(OR) (4Àn) (OH) (nÀ1) ) 2 O þ H 2 O.…”

Synergistic flame‐retardant effect of phosphaphenanthrene derivative and aluminum diethylphosphinate in glass fiber reinforced polyamide 66

“…On the other hand, because of good thermal stability and non-volatile properties, inorganic filler retardants have also been added into PA to investigate the FR effect in the previous studies of academy and industry, such as montmorillonite 17 and silica nanocomposites. 18 AlPi is a favorable free-halogen organic phosphorous FR. 19,20 Many researches have revealed FR mechanism of AlPi, and it has been widely used in PA and other thermoplastics.…”

“…At the moment, phosphorous and phosphorus‐nitrogen FRs are usually used in PA, such as aluminum diethylphosphinate (AlPi), melamine polyphosphate (MPP), melamine cyanurate, N ‐benzoic acid (ethyl‐ N ‐benzoic acid formamide) phosphamide, and red phosphorus, which can weaken or solve the melt dripping problem of PA during combustion. On the other hand, because of good thermal stability and non‐volatile properties, inorganic filler retardants have also been added into PA to investigate the FR effect in the previous studies of academy and industry, such as montmorillonite and silica nanocomposites …”