High‐density packing of the main chains of amorphous high‐refractive‐index polyguanamine derivatives and aromatic polyamide block copolymers has been investigated in 2D molecular films. Polymer main chains with multiple and bulky aromatic rings are difficult to pack owing to steric hindrance. However, the intermolecular affinity can be enhanced by chain rearrangement. The polymer chain arrangement in 2D films has been controlled at the air/water interface. Furthermore, rearrangement of the main chains at the water/substrate interface during transfer to the solid substrate is also important. The highly hydrophobic polyguanamine derivatives form single‐particle layers at the air/water interface, with their bulky functional groups packed densely in nanospheres owing to π–π interactions. The hydrophobic aromatic polyamide copolymers form an expanded monolayer including unpacked chains at the air/water interface. As these copolymers are rearranged during transfer to the solid substrate, densely packed molecular arrangements with end‐on configurations are attained in the films.

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A transparent and flexible crystalline polymer nanohybrid was fabricated, containing well-dispersed magnetic nanoparticles (MNPs) with organic chainmodified surfaces. The partially fluorinated copolymer matrix used is composed of switchboard-type lamellae. These become transparent owing to the creation of high-density amorphous regions on drawing the corresponding film at just below the polymer melting point. Although the creation of oleo-and hydrophobic fluorinated polymer/organo-modified MNP nanohybrids is generally difficult, formation via melt compounding was confirmed using wide-angle X-ray diffraction and thermal analysis. On organo-modification of the hydroxyl-terminated MNP surface with long-chain fatty acids, the resulting improvement in wettability aids the dispersion of the particles and hence maintains transparency. Nano-dispersion of the organo-filler was considered to result from surface modification-induced improvement of particle miscibility and melt compounding. These nanohybrids have enhanced thermal degradation temperatures and mechanical properties, derived from the nucleation effect caused by the adsorption of the terminal polymer chains onto the organic modifier. POLYM. COMPOS., 00:000-000, FIG. 2. (a) DSC thermogram of neat P(VDF-TeFE) and (b) TG curves of oMNPs with estimated values of surface-modification rate. [Color figure can be viewed at wileyonlinelibrary.com] FIG. 4. (a) Photographs of drawn (five times) and undrawn P(VDF-TeFE) nanohybrids containing 0.2 wt% oMNPs. (b) Schematic illustration of the changes in lamellae arrangement by the high-temperature drawing. [Color figure can be viewed at wileyonlinelibrary.com] 6 POLYMER COMPOSITES-2017 FIG. 5. (a) WAXD profiles of organo-Fe 3 O 4 (5 nm), neat P(VDF-TeFE), and P(VDF-TeFE) nanohybrids containing 0.2 and 0.5 wt% organo-Fe 3 O 4 (5 nm). (b) Schematic illustration of the layered structure of oMNPs, and their dispersion state in the matrix. [Color figure can be viewed at wileyonlinelibrary.com] FIG. 7. (a) The content of oMNPs in the polymer matrix versus crystallite size obtained with the Scherrer equation. (b) Schematic illustration of the changes in crystallite size along the ab-plane induced by oMNP addition. [Color figure can be viewed at wileyonlinelibrary.com]

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The role of organo-modifying molecular chains in the formation of molecular films of organo-modified nanodiamond is discussed herein based on interfacial chemical particleintegration of organo-modified nanodiamond having a particle size of 5 nm. The surface of nanodiamond is known to be covered with a nano-layer of adsorbed water. This water nano-layer was exploited for organo-modification of nanodiamond with long-chain fatty acids via adsorption, leading to nano-dispersion of nanodiamond in general organic solvents as a mimic of solvency. The organo-modified nanodiamond dispersed "solution" was used as a spreading solution for depositing a mono-"particle" layer on the water surface, and a Langmuir particle layer was integrated at the air/water interface. Multi-"particle" layers were then formed via the Langmuir-Blodgett technique, and were subjected to fine structural analysis. The effect of organo-modification enabled integration and multilayer formation of inorganic nano-particles due to enhancement of the van der Waals interactions between the chains. That is to say, the "encounter" between the organo-modifying chain and the inorganic particles led to solubilization of the inorganic particles and enhanced interactions between the particles, which can be regarded as imparting new function to the organic molecules.