Synthesis and characterisation of hydroxyl end-capped telechelic polymers with poly(methyl methacrylate)-block-poly(n-butyl acrylate) backbones via atom transfer radical polymerisation

Zhang, Huiqi; Jiang, Xulin; Linde, R. van der

doi:10.1016/j.polymer.2003.12.052

Cited by 51 publications

(33 citation statements)

References 53 publications

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“…The reaction temperature proved to have a significant influence on the polymerizations, as previously reported for ATRP with conventional heating. [22][23][24] The polymerizations were controlled at 90 and 110 8C, showing linear kinetic plots, a linear increase of M n;SEC with C MMA , and relatively low PDIs (<1.5) for the obtained polymers. However, the polymerizations lost their control at 130 and 150 8C, as demonstrated by the curved kinetic plots and high PDIs for the obtained polymers.…”

Section: Resultsmentioning

confidence: 98%

Monomode Microwave‐Assisted Atom Transfer Radical Polymerization

Zhang

Schubert

2004

Macromol. Rapid Commun.

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Summary: The first monomode microwave‐assisted atom transfer radical polymerization (ATRP) is reported. The ATRP of methyl methacrylate was successfully performed with microwave heating, which was well controlled and provided almost the same results as experiments with conventional heating, demonstrating the absence of any “microwave effect” in ATRP (in contrast to several literature reports). Furthermore, we found that the main advantage of the microwave‐assisted reactions over conventional reactions, i.e., a significant increase of reaction rates, only had its limited application in ATRP, even in very slow ATRP systems with high targeted molecular weights.Comparison of the kinetic plots of the ATRP of MMA ([MMA]0/[EBIB]0/[CuCl]0/[NHPMI]0 = 200:1:1:3, MMA/DMF = 1:1 v/v) carried out at 90 °C in DMF with microwave (▴) and conventional heating (•), respectively.imageComparison of the kinetic plots of the ATRP of MMA ([MMA]0/[EBIB]0/[CuCl]0/[NHPMI]0 = 200:1:1:3, MMA/DMF = 1:1 v/v) carried out at 90 °C in DMF with microwave (▴) and conventional heating (•), respectively.

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Section: Resultsmentioning

confidence: 98%

Monomode Microwave‐Assisted Atom Transfer Radical Polymerization

Zhang

Schubert

2004

Macromol. Rapid Commun.

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“…4,5 Meanwhile, polymer grafting technology has been extensively used to attach pendant functional groups to the polymer chain and to crosslink other chains. 8,9 In our previous research, crosslinking of PU with agents such as glycerol, pentaerythritol, and dextrin has already been investigated to improve the tensile strength and shape memory effect. 8,9 In our previous research, crosslinking of PU with agents such as glycerol, pentaerythritol, and dextrin has already been investigated to improve the tensile strength and shape memory effect.…”

Section: Introductionmentioning

confidence: 99%

The effect of the diphenylamino side group on the reduction of the molecular interaction between polyurethane copolymer chains

Chung

Lee

Chun

2012

J of Applied Polymer Sci

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Polyurethane (PU) with a diphenylamino side group is tested for low temperature flexibility at À30 C and compared with a linear PU without the diphenylamino side group. The PU is composed of 4,4 0 -methylenebis(phenylisocyanate) (MDI), poly (tetramethyleneglycol) (PTMG), 1,4-butanediol (BD), and the diphenylamino group that is grafted to PU chains by a second MDI. The mechanical and shape memory properties of these two types of PU, which differ in the PTMG and the diphenylamino group content, are compared. In the best case, a 306% increase in the maximum stress compared with the linear polymer is attained with a little decrease in the strain. Shape recovery at 45 C increases to 94% and remains $90% after four cyclic tests. Low temperature flexibility can be improved by increasing the diphenylamino content. The PU with a diphenylamino side group demonstrates the low temperature flexibility at À30 C, whereas the linear PU must be warmed to room temperature to attain the same degree of flexibility. The exceptional low temperature flexibility is analyzed and is discussed together with the experimental data.

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“…This characteristic makes ATRP very useful for preparing various end-functionalized polymers because the halogen end groups can easily be transferred to other functional groups using simple standard organic procedures like nucleophilic substitution reactions. [13][14][15] 1,3-dipolar cycloadditions from the reactions between azides and alkynes, known as ''click'' reactions, have recently emerged as a powerful and versatile class of chemical transformations. [16][17][18] The popularity of these reactions can be attributed to their mild reaction conditions, quantitative yields, the absence of by-product formation and their regioselectivity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Well‐Defined Mid‐Chain Functional Macrophotoinitiators of Polystyrene by Combination of ATRP and “Click” Chemistry

Degirmenci

Alter

Genli

2011

Macro Chemistry & Physics

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A combination of ATRP and “click” chemistry is employed for efficient preparation of a novel well‐defined mid‐chain functional macrophotoinitiator of polystyrene. Bromo‐terminated polystyrene (PSt‐Br) is prepared by ATRP of styrene using a methyl‐2‐bromopropanoate initiator with CuBr/PMDETA. Subsequently, PSt‐Br is converted to PSt‐N3 by a simple nucleophilic substitution reaction. A dialkyne‐functionalized photoinitiator (alkyne‐PI‐alkyne) is synthesized using a dihydroxy‐functional photoinitiator and propargyl bromide. Then the “click” reaction between PSt‐N3 and alkyne‐PI‐alkyne is performed by Cu(I) catalysis. Spectroscopic studies reveal that low‐polydispersity polystyrene with the desired photoinitiator functionality in the middle of the chain (PSt‐PI‐PSt) is obtained. magnified image

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Synthesis and characterisation of hydroxyl end-capped telechelic polymers with poly(methyl methacrylate)-block-poly(n-butyl acrylate) backbones via atom transfer radical polymerisation

Cited by 51 publications

References 53 publications

Monomode Microwave‐Assisted Atom Transfer Radical Polymerization

Monomode Microwave‐Assisted Atom Transfer Radical Polymerization

The effect of the diphenylamino side group on the reduction of the molecular interaction between polyurethane copolymer chains

Synthesis and Characterization of Well‐Defined Mid‐Chain Functional Macrophotoinitiators of Polystyrene by Combination of ATRP and “Click” Chemistry

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