Preparations and properties of new monomeric light stabilizers

Liu, Naichun; Pan, Jiang-Qing; Lau, Weber Kam On

doi:10.1016/s0141-3910(98)00063-9

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…The stoichiometry ratio is 0.5 M MAA: 1 M TDI: 0.5 M β-CD. The MAA-βCD monomer was synthesized according to some literature with slight modification [ 66 – 68 ]. Firstly, MAA and toluene-2,4-diisocyanate (TDI) were allowed to mix in 40 mL DMAC; 0.1% dibutyltin dilaurate (catalyst) was then added and the solution was stirred magnetically for 1 h at room temperature in the presence of nitrogen gas.…”

Section: Methodsmentioning

confidence: 99%

Molecular Imprinted Polymer of Methacrylic Acid Functionalised β-Cyclodextrin for Selective Removal of 2,4-Dichlorophenol

Surikumaran

Mohamad

Sarih

2014

IJMS

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This work describes methacrylic acid functionalized β-cyclodextrin (MAA-βCD) as a novel functional monomer in the preparation of molecular imprinted polymer (MIP MAA-βCD) for the selective removal of 2,4-dichlorophenol (2,4-DCP). The polymer was characterized using Fourier Transform Infrared (FTIR) spectroscopy, Brunauer-Emmett-Teller (BET) and Field Emission Scanning Electron Microscopy (FESEM) techniques. The influence of parameters such as solution pH, contact time, temperature and initial concentrations towards removal of 2,4-DCP using MIP MAA-βCD have been evaluated. The imprinted material shows fast kinetics and the optimum pH for removal of 2,4-DCP is pH 7. Compared with the corresponding non-imprinted polymer (NIP MAA-βCD), the MIP MAA-βCD exhibited higher adsorption capacity and outstanding selectivity towards 2,4-DCP. Freundlich isotherm best fitted the adsorption equilibrium data of MIP MAA-βCD and the kinetics followed a pseudo-second-order model. The calculated thermodynamic parameters showed that adsorption of 2,4-DCP was spontaneous and exothermic under the examined conditions.

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Section: Methodsmentioning

confidence: 99%

Molecular Imprinted Polymer of Methacrylic Acid Functionalised β-Cyclodextrin for Selective Removal of 2,4-Dichlorophenol

Surikumaran

Mohamad

Sarih

2014

IJMS

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“…New functional monomers have been prepared by controlled isocyanation in two steps (34,35). In the first step an α,α-unsaturated acid, such as methacrylic acid (MAA), or acrylic acid (AA), reacts with diisocyanate (TDI, HMDI) at a 1:1 mole ratio, whereby one of the two isocyanate groups (-N=C=O) is converted to carry a double bond (-C=C- For modification on the wetting property of polymers:…”

Section: Synthesis Of Functional Monomersmentioning

confidence: 99%

Applications of Isocyanation for Polymer Systems

Pan

Lau²

2001

Journal of Macromolecular Science, Part C

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Reactivity ratios and sequence structures of the copolymers prepared using photo‐induced copolymerization of MMA with MTMP

Liu

Zhang

Cui

et al. 2012

Magnetic Reson in Chemistry

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4-Methacryloyl-2,2,6,6-tetramethyl-piperidine (MTMP) was applied as reactive hindered amine piperidine. Photo-induced copolymerization of methyl methacrylate (MMA, M(1)) with MTMP (M(2)) was carried out in benzene solution at ambient temperature. The reactivity ratios for these monomers were measured by running a series of reactions at various feed ratios of initial monomers, and the monomer incorporation into copolymer was determined using (1)H NMR. Reactivity ratios of the MMA/MTMP system were measured to be r(1)= 0.37 and r(2)= 1.14 from extended Kelen-Tüdos method. The results show that monomer MTMP prefers homopolymerization to copolymerization in the system, whereas monomer MMA prefers copolymerization to homopolymerization. Sequence structures of the MMA/MTMP copolymers were characterized using (1)H NMR. The results show that the sequence structure for the main chain of the MMA/MTMP copolymers is mainly composed of a syndiotactic configuration, only with a little heterotactic configuration. Three kinds of the sequences of rr, rr', and lr' in the syndiotactic configuration are found. The sequence-length distribution in the MMA/MTMP copolymers is also obtained. For f(1)= 0.2, the monomer unit of MMA is mostly separated by MTMP units, and for f(1)= 0.6, the alternating tendency prevails and a large number of mono-sequences are formed; further up to f(1)= 0.8, the monomer unit of MTMP with the sequence of one unit is interspersed among the chain of MMA.

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Preparations and properties of new monomeric light stabilizers

Cited by 6 publications

References 19 publications

Molecular Imprinted Polymer of Methacrylic Acid Functionalised β-Cyclodextrin for Selective Removal of 2,4-Dichlorophenol

Molecular Imprinted Polymer of Methacrylic Acid Functionalised β-Cyclodextrin for Selective Removal of 2,4-Dichlorophenol

Applications of Isocyanation for Polymer Systems

Reactivity ratios and sequence structures of the copolymers prepared using photo‐induced copolymerization of MMA with MTMP

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