Achieving Dimensional Stability Using Functional Fillers

Preparation and properties of polyimide nanocomposites with negative thermal expansion nanoparticle filler

“…The extent of CTE reduction caused by ZrW 2 O 8 nanoparticles in this research was in the same range as that observed in the literature for micron sized ZrW 2 O 8 particles [17,21,24,25,35]. A composite prepared for this study with 5 volume% APTES modified micron sized ZrW 2 O 8 (1e15 mm long and 1e2 mm wide) and LaRC-CP1 PI exhibited a CTE of 54.3 AE 3.0 ppm C À1 , which was similar to the average CTE for the nanocomposite at the same loading (56.8 AE 2.0 ppm C À1 ).…”

Zirconium tungstate reinforced cyanate ester composites with enhanced dimensional stability

“…Shi and coworkers 10 reported that the incorporation of 30 volume (vol)% of ZrW 2 O 8 with a polyester resin resulted in a 40% decrease in CTE. Weyer and coworkers 11 observed an 80% reduction in CTE on addition of up to 52 vol% ZrW 2 O 8 in a cyanate ester resin. Sullivan and Lukehart 12 examined the impact of micronsize and nano-size zirconium tungstate reinforcements on the CTE behavior of a polyimide film; they reported a 30% decrease in CTE on incorporation of 22 vol% micron-size ZrW 2 O 8 , whereas the CTE was found to decrease by 21% on incorporation of only 1.7 vol% nano-size filler.…”

Effect of a Zirconium Tungstate Filler on the Cure Behavior of a Cyanate Ester Resin

“…The values of the CTE for ZrW 2 O 8 can range from −8.7 × 10 −6 to −1 × 10 −6 K −1 , depending on the temperature and pressure . Consequently, a few studies in the literature − have reported that the CTE of polymer matrix composites can be tailored through the incorporation of various amounts of ZrW 2 O 8 . In recent work , the incorporation of micrometer-sized ZrW 2 O 8 has been found to result in dramatic reductions in the CTE of BECy.…”