Sequential amphiphilic and pH responsive hyperbranched copolymer: influence of hyper branching/pendant groups on reversible self assembling from polymersomes to aggregates and usefulness in waste water treatment

Das, T. K.; Sengupta, Samarjit; Ghorai, Uttam Kumar; Dey, Ayan; Bandyopadhyay, Abhijit

doi:10.1039/c5ra22567a

Cited by 7 publications

(3 citation statements)

References 24 publications

(27 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Mark–Houwink exponent “α” was determined from a prevalent method and the values are plotted in Figure against the copolymer composition. It shows a steady fall from 0.70 in P1 to 0.40 in P3 and implicated a gradual transmission from a linear architecture in P1 to an extremely branched and compact architecture in P3 through P4 and P2 (extent of branching P2 > P4)…”

Section: Resultsmentioning

confidence: 99%

Copolymers from methyl methacrylate and butyl acrylate with hyperbranched architecture

Sengupta

Das

Ghorai

et al. 2017

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

This is a first report of the synthesis and characterization of acrylic copolymers from methyl methacrylate (MMA) and butyl acrylate (BA) with hyperbranched architecture. The copolymers were synthesized using a free radical polymerization (Strathclyde method) in emulsion technique. Divinyl benzene was used as the brancher which acted as a comonomer and 1-dodecanethiol was used as a chain terminating agent. A linear copolymer from MMA and BA was also synthesized for comparison. The hyperbranched architecture was established from spectroscopic and rheological measurements. The gel permeation chromatography showed all hyperbranched copolymers were low molecular weight with lower polydispersity index (PDI) ( M n 23,000, PDI 2.00) compared to the linear grade ( M n 93,000, PDI 2.20). They were more spherical and achieved lower viscosity (yet higher solubility, >90%) than the linear grade (<50%) which was mostly open ended. Lower viscosity at equivalent solid content made the hyperbranched polymers a potential binder for adhesive and coating application.

show abstract

Section: Resultsmentioning

confidence: 99%

Copolymers from methyl methacrylate and butyl acrylate with hyperbranched architecture

Sengupta

Das

Ghorai

et al. 2017

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…The empirical Cox-Merz rule was applied to differentiate between the flow behavior among the modified TPUs in low angular frequency domain. 69 As expressed in Equation 4, the rule delineates the interdependence of the frequency jɳ*j on the shear rate ɳ(γ') within the flow region.…”

Section: Rheological Studymentioning

confidence: 99%

Fabrication of self‐healable thermoplastic polyurethane by masterbatch technology

Dasgupta

Basak

Sengupta

et al. 2021

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

This paper reports development of self-healable thermoplastic polyurethane (TPU) compound through the mixing of masterbatches of TPU and EVA (poly [ethylene-co-vinyl acetate]) (EVA) having various mole compositions. The aim was to promote a limited chemical interaction between TPU and EVA in the pristine compound that can enhance viscoelastic flow across the cut surface for autonomic healing. The healing was externally stimulated through microwave irradiation and the healing efficiency was determined from changes in tensile properties and complemented by image analysis. Infrared spectroscopy was used to detect TPU-EVA crosslinking in the TPU compound, which was further delineated from viscoelastic and swelling results. Tensile properties demonstrated a drop in tensile modulus, strength, and elongation at break than original TPU on increasing EVA concentration, but those, at the same time, were retained until the fifth healing cycles with higher EVA concentration in the masterbatch. The healing mechanism was attributed to the destruction of the hard domain in TPU leading to a marked increase in viscoelastic mobility at the interface of the cut section. The pristine TPU modified with higher amount of EVA in the masterbatch exhibited the highest range of healing efficiency (sample CC0-93%, sample BB0-97%, respectively)), reinstated the hypothesis of mixing a higher amount of EVA to promote autonomic healing. EVA based TPU compounds with superior self-healing property makes them an ideal candidate for applications in cable insulation and shape-memory devices.

show abstract

“…In recent years, we have introduced a new copolymer architecture that combines the concepts of branched vinyl copolymerisation and linear-dendritic hybrids 24 (LDH; linear polymers with ideal dendron chain ends), using low concentrations of divinyl monomers 25 within the controlled radical polymerisation of the LDH structures. The resulting copolymers, named hyperbranched-polydendrons ( hyp -PDs), have a complex architecture of large numbers of conjoined chains with ideally-branched, highly functional dendron chain ends.…”

Section: Introductionmentioning

confidence: 99%

Designing single trigger/dual-response release and degradation into amine-functional hyperbranched-polydendron nanoprecipitates

et al. 2020

View full text Add to dashboard Cite

show abstract

Sequential amphiphilic and pH responsive hyperbranched copolymer: influence of hyper branching/pendant groups on reversible self assembling from polymersomes to aggregates and usefulness in waste water treatment

Abstract: Hyperbranched copolymers self assembled from polymersomes to aggregates and encapsulated both hydrophilic/hydrophobic molecules but with varied retention proficiency depending upon the medium pH.

Cited by 7 publications

References 24 publications

Copolymers from methyl methacrylate and butyl acrylate with hyperbranched architecture

Copolymers from methyl methacrylate and butyl acrylate with hyperbranched architecture

Fabrication of self‐healable thermoplastic polyurethane by masterbatch technology

Designing single trigger/dual-response release and degradation into amine-functional hyperbranched-polydendron nanoprecipitates

Contact Info

Product

Resources

About