Water soluble polyhedral oligomeric silsesquioxane based amphiphilic hybrid polymers: Synthesis, self-assembly, and applications

Ullah, Asad; Ullah, Shaheed; Khan, Gul Shehzada; Shah, Syed Mujtaba; Hussain, Zakir; Muhammad, Saz; Siddiq, Muhammad; Hussain, Hazrat

doi:10.1016/j.eurpolymj.2015.11.023

Cited by 29 publications

(23 citation statements)

References 127 publications

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“…Organic groups (R) at each of the eight corners have been comprehensively studied to obtain a variety of valuable hybrid polymers with excellent properties . The POSS nanobuilding block is a strongly hydrophobic core, and its use in the design of amphiphilic hybrid macromolecules has been an exciting academic and industrial research area in recent years . As a highly efficient method, the controlled/living radical polymerization technique is used to obtain a broad range of amphiphilic hybrid polymers containing POSS at end or side or core positions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and surface properties of star-shaped polymeric surfactants with polyhedral oligomeric silsesquioxane core

et al. 2017

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Star-shaped amphiphilic polymeric surfactants comprising a hydrophobic polyhedral oligomeric silsesquioxane (POSS) core and hydrophilic poly(ethylene glycol) (PEG) arms with various chain lengths are successfully synthesized using copper(I)-catalysed azide-alkyne cycloaddition (CuAAC) click reaction. Their chemical structures and molecular characteristics are clearly confirmed using Fourier transform infrared and 1 H NMR spectroscopies and gel permeation chromatography, and no homopolymer is found after CuAAC click reaction. Aqueous solutions of these star-shaped polymers have been investigated using atomic force and transmission electron microscopies and dynamic light scattering studies and it is found that they can self-assemble into micelles. The sizes of the micelles can be adjusted by the length of the PEG arms, where longer chains not only lead to increased micelle sizes, but also reduce the contact angle values. Moreover, the melting points and root mean square roughness of the obtained star-shaped polymers are slightly increased on increasing the chain length of the PEG arms.

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Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and surface properties of star-shaped polymeric surfactants with polyhedral oligomeric silsesquioxane core

et al. 2017

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“…The POSS derivatives have been successfully incorporated into a wide range of polymer chains via various copolymerization reactions, including polycondensation, polyaddition, or radical polymerization . However, only few papers refer to the olefin–POSS coordinative copolymerization and they present only the application of metallocene catalytic systems .…”

Section: Introductionmentioning

confidence: 99%

Ethylene/POSS copolymerization behavior of postmetallocene catalysts and copolymer characteristics

Groch

Dziubek

Czaja

et al. 2017

J. Polym. Sci. Part A: Polym. Chem.

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Copolymerization of ethylene with iso‐butyl substituted monoalkenyl(siloxy)‐ or monoalkenylsilsesquioxane (POSS) comonomers over bis(phenoxy‐imine) and salen‐type titanium and zirconium catalysts was studied. It was found that the polyreaction performance was significantly depended by the kind of the catalyst and by the structure and concentration of POSS in the feed. The POSS comonomer was efficiently incorporated into the polymer chain at up to 0.2 mol %. The differences in the copolymer compositions as the functions of the catalyst kind and the POSS comonomer were observed, including the varied number‐average sequence length of ethylene and unsaturated end groups, as determined by 1H NMR and FT‐IR. The presence of POSS comonomers affected also the melting and crystallization behavior of the copolymers, as evidenced by DSC, because of influence on the polymer chain arrangement. The POSS units could act as the nucleating agents. Moreover, the crystal and structural parameters of ethylene/POSS copolymers were evaluated on the basis of X‐ray results, and the limited self‐aggregation of POSS incorporated into the polymer chain, the small number and size of POSS aggregates, and the increased crystallinity degree of copolymers were demonstrated. The ethylene/POSS copolymers produced by postmetallocenes offered also high thermal stability and interesting morphological properties. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 3918–3934

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“…Due to its stable and rigid nanocage‐like well‐defined structure, and its convenient assimilation into various types of hybrid nanostructures, POSS has received significant attention from a diverse spectrum of researchers, ranging from the material science and engineering to biomedical fields. Integration of the POSS cage into organic polymers either via chemical bonding or physical blending significantly improves mechanical strength, thermal stability, and reduces flammability . The hydrophobic and biocompatible nature of POSS make it a suitable candidate for biomaterials in potential biomedical and pharmaceutical applications …”

Section: Introductionmentioning

confidence: 99%

Nitroxide‐mediated radical polymerization of methacryloisobutyl POSS and its block copolymers with poly(n‐acryloylmorpholine)

Ullah

Shah

Hassan

et al. 2020

Journal of Polymer Science

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Nitroxide-mediated radical polymerization (NMP) of the bulky methacryloisobutyl-polyhedral oligomeric silsesquioxane (POSS-MA) is successfully achieved after optimizing reaction conditions such as selection of controlling comonomer, comonomer feed molar ratio, and temperature (10 mol % styrene (S) comonomer at 110 C using the commercially available BlocBuilder as the NMP initiator). The P(POSS-MA-co-S) with a molecular weight of~8000 g/ mol and dispersity Ð-1.2 is afforded under the optimized reaction conditions. The chain-end fidelity is verified by chain extension experiments with N-acryloyl morpholine (ACM) via NMP that produces well-defined amphiphilic hybrid P(POSS-MA-co-S)-b-P(ACM) x block copolymers, where the subscript "x" represents the degree of polymerization of (ACM) block (182 < x < 695). The size exclusion chromatography (SEC) of the as-synthesized samples reveals the presence of some dead P(POSS-MA-co-S) chains that could be removed by a simple purification step. Kinetic investigations reveal a first-order kinetics for the polymerization of ACM using P(POSS-MA-co-S) as the macroinitiator under NMP conditions. The kinetic and SEC data confirms the controlled nature of the NMP of ACM. Being amphiphilic, the formed P(POSS-MA-co-S)-b-P(ACM) x block copolymers self-assembled in aqueous solution as revealed by the fluorescence spectroscopy experiments with pyrene as the probe for determination of the critical micelle concentration and dynamic light scattering studies.

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Water soluble polyhedral oligomeric silsesquioxane based amphiphilic hybrid polymers: Synthesis, self-assembly, and applications

Cited by 29 publications

References 127 publications

Synthesis, characterization and surface properties of star-shaped polymeric surfactants with polyhedral oligomeric silsesquioxane core

Synthesis, characterization and surface properties of star-shaped polymeric surfactants with polyhedral oligomeric silsesquioxane core

Ethylene/POSS copolymerization behavior of postmetallocene catalysts and copolymer characteristics

Nitroxide‐mediated radical polymerization of methacryloisobutyl POSS and its block copolymers with poly(n‐acryloylmorpholine)

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