Multiwalled carbon nanotubes grafted with polyhedral oligomeric silsesquioxane and its dispersion in poly(l-lactide) matrix

Poly(lactic acid)/Aluminum Oxide Composites Fabricated by Sol‐Gel and Melt Compounding Processes

“…In the composites, the amount of SG1, SG2, and CALC may not be sufficient to sufficiently accelerate the crystal growth. Similarly in the study by Streller et al, [54] where boehmite fillers with five different crystallite sizes (10,20,40,53, and 60 nm) were used in isotactic poly(propylene) (iPP) with a loading level of 10 wt.-%, the degree of crystallinity of iPP was not affected by the fillers. However, it was reported that the boehmites were effective nucleating agents for iPP, increasing the melt crystallization temperature by about 14 8C.…”

“…The occurrence of bimodal melting behavior of PLA and its composites was reported by several researchers. [40][41][42][43][44] This phenomenon was linked to various reasons: [45][46][47][48][49][50][51][52] (i) The effect of melting the original crystals, recrystallization, and remelting the recrystallized crystals during the heating scan; (ii) the presence of different lamellae morphologies formed prior to the heating scan; (iii) the existence of more than one crystal structure (polymorphism); (iv) processing conditions or molecular weight distribution; and (v) the effect of low crystallization temperature which caused the formation of the disordered alpha phase of PLA.…”

Highly Homogeneous Carbon Nanotube-Polycaprolactone Composites with Various and Controllable Concentrations of Ionically-Modified-MWCNTs

“…The clear advantage for this approach may be that CNT aggregation in the composites can be greatly prevented, leading to mechanical improvement. [7][8][9][10][11][12] However, the manufacturing process was time-consuming and the electrical conductivity could not be much enhanced. This was believed that the additional anchoring of polymer molecules on the CNT surface caused a kind of blocking or encapsulation of every nanotube molecule, thereby leading to hindrance of the interconnection of the CNTs.…”

Modification of Thermoplastics with Reactive Silanes and Siloxanes

“…Sidewall functionalization of CNTs, introduction mainly carboxylic groups, makes possible to chemically attach these nanofillers with polymers. Chen and Shimizu (2008) prepared the nanocomposites of poly(L-lactide) (PLLA) reinforced by aminopropylisooctyl POSS modified multi-wall nanotubes (MWNTs) (MWNT-g-POSS). They have observed the homogeneous dispersion of MWNTs throughout the PLLA MWNT-g-POSS composites without any aggregation.…”