The chemoenzymatic synthesis of AB-type diblock copolymers from a novel bifunctional initiator

Sha, Ke; Li, Dongshuang; Li, Yapeng; Ai, Peng; Wang, Wei; Xu, Yongjian; Liu, Xiaotian; Wu, Mingzhi; Wang, Shuwei; Bao, Zhenan; Wang, Jing‐Yuan

doi:10.1016/j.polymer.2006.04.019

Cited by 28 publications

(20 citation statements)

References 22 publications

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“…Thus, when the reaction was performed at 100 C (Run 9 of 8 of Table II), 97% conversion with 1.40 molar mass distribution were found. 44 The temperature dependency of the apparent rate constants (k aap ), the magnitudes of the activation enthalpy (DH ‡ ), activation entropy (DS ‡ ), and activation energy (E a ) were determined by evaluation of the resulting straight Eyring and Arrhenius correlations ( Figure 7). Figure 7 also shows that the apparent rate of polymerization increases with increasing temperature because of increase of both the radical propagation rate constant and the atom transfer equilibrium constant.…”

Section: Optimization Of Reaction Conditions On Polymerizationmentioning

confidence: 99%

Uptake of hazardous heavy metal ions by aqueous solution of poly(acrylamide) prepared through atom transfer radical polymerization process

Mishra

Kumar

2012

J of Applied Polymer Sci

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Poly(acrylamide) (PACM) used in this study was prepared through an effective atom transfer radical polymerization process and characterized by NMR, FTIR, and thermo gravimetric analysis. Resulting polymer was used for the uptake of heavy metal ions from aqueous solution. Partition coefficient, retention capacity, and metal ion uptake behavior in aqueous solution of PACM at different monomer percent conversions and effect of parameters for optimization of polymerization reaction gives thermally stable PACM. Efficiency of metal ion uptake of different molecular weights of PACM were tested in batches for Ni 2þ , Pb 2þ , Cu 2þ , Zn 2þ , and Hg 2þ ions in single metal solution. Metal ion sorption capacities increase with increase in polymer concentration. Metal ion sorption capacities in single metal system were 6.3 mg g À1 Ni 2þ , 6.0 mg g À1 Pb 2þ , 6.9 mg g À1 Cu 2þ , 6.2 mg g À1 Zn 2þ , 22.4 mg g À1 Hg 2þ for PACM of 88% conversion (Mn ¼ 19,850). Uptake by the PACM indicates that they are effective in removing metal ions from single metal ion solutions.

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Section: Optimization Of Reaction Conditions On Polymerizationmentioning

confidence: 99%

Uptake of hazardous heavy metal ions by aqueous solution of poly(acrylamide) prepared through atom transfer radical polymerization process

Mishra

Kumar

2012

J of Applied Polymer Sci

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“…In a fi rst series of publications the group reported the successful synthesis of a block copolymer comprising PCL and polystyrene blocks from the commercially available dual initiator 4 [20,21] . This concept was then further applied for the chemoenzymatic synthesis of amphiphilic block copolymers by macroinitiation of glycidyl methacrylate ( GMA ) from the ATRP functional PCL [30] .…”

Section: Dual Initiator Approachmentioning

confidence: 99%

Enzymes in the Synthesis of Block and Graft Copolymers

Howdle

Heise

2010

Biocatalysis in Polymer Chemistry

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“…[26][27][28] One block was generated by atom-transfer radical polymerization, and the other block was synthesized by lipases, producing polyester segments. These block copolymers were characterized regarding their chemical composition but a further analysis of the aggregation behavior of these materials was not undertaken.…”

Section: Angewandte Chemiementioning

confidence: 99%