Amphiphilic Comb‐Like Poly(oxyethylene) and Its Complexes with LiClO₄: Synthesis and Mesomorphic Behavior

Abstract

Summary: We prepared an amphiphilic, comb‐like poly(oxyethylene) containing decyl‐tri(oxyethylene) amphiphiles in the side chain using a polymer analogous reaction to obtain a novel nonionic amphiphilic polymeric system with high molecular weight. The amphiphilic comb‐like poly(oxyethylene) itself only showed a side‐chain crystalline phase below its melting temperature of −31 °C. When the polymer was mixed with lithium perchlorate, a smectic liquid‐crystalline phase appeared. The ordered phases of the polymer and the polymer mixture were studied by differential scanning calorimetry, polarized optical microscopy, and X‐ray diffraction.POM image (200 X) of D3OTP1 at room temperature.imagePOM image (200 X) of D3OTP1 at room temperature.

Preparation of polymer composites containing gold nanonetworks using an amphiphilic poly(oxyethylene) brush

“…7 The number average molecular weight (M n ) and the polydispersity index (M w /M n ) of D3OTP calculated using polystyrene standards by gel permeation chromatography (GPC) were 156,000 g/mol and 1.65, respectively. Theoretically, it is well-known that the comb-like polymer has a more compact hydrodynamic volume compared with that of corresponding linear polymer having identical molecular weight.…”

“…Previously, we found that the hydrophilic core part of D3OTP could be complexed with metallic salt to form thermotropic liquid crystalline phases as mentioned in the introduction part. 7 Similarly, it was also reported that the lyotropic liquid crystalline phases could be obtained from the mixtures of nonionic surfactants that have oligo(oxyethylene) units and transition metal salts through the interactions between the oxyethylene units and the metallic salts. 13,14 We attempted to observe core-shell structures of the D3OTP and Au(III)@D3OTP using atomic force microscopy (AFM) as others.…”

“…The more detailed synthetic procedures and characterizations including 1 H NMR, 13 C NMR, and FT-IR results of D3OTP were reported before. 7 Characterization. 1 H NMR spectra were obtained on a JEOL JNM-LA 300 spectrometer at 300 MHz.…”

Synthesis and characterization of starch piperinic ester and its self‐assembly of nanospheres

“…[2][3][4][5][6] This provides a useful basis for industrial, pharmaceutical, and biomedical applications. [7][8][9] Since many important therapeutic agents have poor solubility in aqueous solution, it is quite a challenge to develop effective systems for delivery of these agents. Micelle-like aggregates of amphiphilic copolymers have been recently receiving much attention as carriers for hydrophobic drug.…”

Synthesis and characterization of poly(vinyl amine)‐based amphiphilic comb‐like dextran glycopolymers by a two‐step method

“…Amphiphilic polymers undergo intramolecular microphase separation and form self‐organized aggregates with ordered supramolecular architectures. This provides a useful basis for industrial, pharmaceutical, and biomedical applications 1–3. Recently, amphiphilic saccharide polymers (glycopolymers) have attracted interest in the development of nano‐sized devices, for improving interfacial biocompatibility, and for studying carbohydrate‐protein recognition 4–7.…”