Interfacial aggregation behavior of triblock terpolymers

He, Guanying; Wen, Gangyao; Skandalis, Athanasios; Pispas, Stergios; Liu, Dongxue; Zhang, Wang

doi:10.1007/s10965-022-03244-7

Cited by 4 publications

(2 citation statements)

References 37 publications

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“…Physical stimuli such as temperature, light, electrical, and magnetic fields affect the thermodynamic and physical parameters of the system and alter the molecular interactions. 38 At present, some environmentally responsive block copolymers containing poly(N-isopropylacrylamide) (PNIPAM), [40][41][42] poly [2-(dim ethylamino)ethyl methacrylate] (PDMAEMA) [43][44][45] and poly [2-(diisopropylamino) ethyl methacrylate] (PDIPA EMA) 38 were mainly studied. At the air/water interface, the aggregation behavior of environmentally responsive block copolymers was also influenced by copolymer type, subphase pH, 26,[46][47][48] and temperature.…”

Section: Introductionmentioning

confidence: 99%

Effects of subphase pH and temperature on the interfacial behavior of double hydrophilic diblock copolymer PDEGMA‐b‐PDIPAEMA

Li,

Wen,

Selianitis

et al. 2023

J of Applied Polymer Sci

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The aggregation behavior of two pH‐ and temperature‐responsive diblock copolymers of poly[di‐(ethylene glycol) methyl ether methacrylate]‐block‐poly[2‐(diisopropylamino) ethyl methacrylate] (PDEGMA‐b‐PDIPAEMA) at the air/water interface and the structures of their Langmuir–Blodgett (LB) films were studied by the Langmuir monolayer technique and atomic force microscopy, respectively. At the air/water interface, PDEGMA‐b‐PDIPAEMA tends to form the core‐shell‐corona micellar structure composed of a PDIPAEMA main chain core, an amino ethyl ester shell, and a PDEGMA corona. Under acidic, neutral, and alkaline conditions, PDIPAEMA blocks are completely protonated, partially protonated, and completely non‐protonated, respectively, and the protonated amino ethyl ester groups are immersed in water before monolayer compression, whereas PDEGMA coronas are adsorbed at the interface. At pH 3, 7, and 10, the limiting areas (A0) for PDEGMA42%‐PDIPAEMA58% (weight percents) and PDEGMA55%‐PDIPAEMA45% are 8.2/10.2/14.0 and 6.7/8.3/8.4 nm2, respectively. The A0 values of the former copolymer are larger than those of the latter. This is because the shells in the former copolymer are denser due to the higher polymerization degree of PDIPAEMA blocks, providing greater steric hindrance for PDEGMA coronas and making the latter more extended at the interface. In contrast to other copolymer systems, the effect of temperature on the isotherms of PDEGMA‐b‐PDIPAEMA is less obvious.

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Section: Introductionmentioning

confidence: 99%

Effects of subphase pH and temperature on the interfacial behavior of double hydrophilic diblock copolymer PDEGMA‐b‐PDIPAEMA

Li,

Wen,

Selianitis

et al. 2023

J of Applied Polymer Sci

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“…This means OEGMA and DIPAEMA segments are not pressed into the subphase, which is different from the interfacial behavior of our previous PDMAEMA‐ b ‐PLMA‐ b ‐POEGMA system. [ 30 ]…”

Section: Resultsmentioning

confidence: 99%

Dense Monolayer Network Structures of Double Hydrophilic Hyperbranched Copolymers at the Air/Water Interface

Tu,

Wen,

Selianitis

et al. 2023

Macromol. Rapid Commun.

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Influences of subphase pH and temperature on the interfacial aggregation behavior of two double hydrophilic hyperbranched copolymers of poly[oligo(ethylene glycol) methacrylate‐co‐(2‐diisopropylamino)ethyl methacrylate] (P(OEGMA‐co‐DIPAEMA)) at the air/water interface were studied by the Langmuir film balance technique. Morphologies of their Langmuir−Blodgett (LB) films were characterized by atomic force microscopy (AFM). At the interface, P(OEGMA‐co‐DIPAEMA) copolymers tend to form a dense network structure of circular micelles composed of branching agent‐connected carbon backbone cores and mixed shells of OEGMA and DIPAEMA segments (pendant groups). This network structure containing many honeycomb‐like holes with diameters of 6−8 nm is identified for the first time and clearly observed in the enlarged AFM images of their LB films. Under acidic conditions, surface pressure versus molecular area isotherms of the two copolymers in the low pressure region show larger mean molecular area than those under neutral and alkaline conditions due to the lack of impediment from DIPAEMA segments. Upon further compression, each isotherm exhibits a wide pseudo‐plateau, which corresponds to OEGMA segments being pressed into the subphase. Furthermore, the isotherms under neutral and alkaline conditions exhibit the lower critical solution temperature behavior of OEGMA segments, and the critical temperature is lower when the hyperbranched copolymer contains higher OEGMA content.This article is protected by copyright. All rights reserved

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Effects of ionic strength and ion-specificity on the interface behavior of PDMAEMA-b-PLMA-b-POEGMA triblock terpolymer

Wen

Skandalis

et al. 2023

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Interfacial aggregation behavior of triblock terpolymers

Cited by 4 publications

References 37 publications

Effects of subphase pH and temperature on the interfacial behavior of double hydrophilic diblock copolymer PDEGMA‐b‐PDIPAEMA

Effects of subphase pH and temperature on the interfacial behavior of double hydrophilic diblock copolymer PDEGMA‐b‐PDIPAEMA

Dense Monolayer Network Structures of Double Hydrophilic Hyperbranched Copolymers at the Air/Water Interface

Effects of ionic strength and ion-specificity on the interface behavior of PDMAEMA-b-PLMA-b-POEGMA triblock terpolymer

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