Direct Measurement of Molecular Weight and Grafting Density by Controlled and Quantitative Degrafting of Surface-Anchored Poly(methyl methacrylate)

AbstractAmphiphilic diblock copolymer poly(methyl methacrylate)-b-poly(acrylic acid) (PMMA-b-PAA) was prepared by 1,1-diphenylethene (DPE) method. Firstly, free radical polymerization of methyl methacrylate was carried out with AIBN as initiator in the presence of DPE, giving a DPE-containing PMMA precursor with controlled molecular weight. tert-Butyl acrylate (tBA) was then polymerized in the presence of the PMMA precursor, and PMMA-b-PtBA diblock copolymer with controlled molecular weight was prepared. Finally, amphiphilic diblock copolymer PMMA-b-PAA was obtained by hydrolysis of PMMA-b-PtBA. The formation of PMMA-b-PAA was confirmed by 1H NMR spectrum and gel permeation chromatography. Transmission electron microscopy and dynamic light scattering were used to detect the self-assembly behavior of the amphiphilic diblock polymers in methanol.

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Variation of periodic crazing based on polymer blends of an ultra-high and a low molecular weight poly(methyl methacrylate)

Journal of Applied Polymer Science ◽

10.1002/app.44332 ◽

2016 ◽

Vol 134 (1) ◽

Cited By ~ 2

Author(s):

Keishi Naito ◽

Akiyoshi Takeno ◽

Ryota Morifuji ◽

Toshiaki Miyata ◽

Minoru Miwa ◽

...

Keyword(s):

Molecular Weight ◽

Methyl Methacrylate ◽

Polymer Blends ◽

Low Molecular Weight ◽

Poly Methyl Methacrylate

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Molecular weight and processing effects on the dissolution properties of thin poly(methyl methacrylate) films

Microelectronic Engineering ◽

10.1016/j.mee.2007.04.141 ◽

2008 ◽

Vol 85 (1) ◽

pp. 93-99 ◽

Cited By ~ 10

Author(s):

A. Kokkinis ◽

E.S. Valamontes ◽

D. Goustouridis ◽

Th. Ganetsos ◽

K. Beltsios ◽

...

Keyword(s):

Molecular Weight ◽

Methyl Methacrylate ◽

Poly Methyl Methacrylate ◽

Dissolution Properties ◽

Processing Effects

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Solvent-Induced Self-Assembly of Mixed Poly(methyl methacrylate)/Polystyrene Brushes on Planar Silica Substrates: Molecular Weight Effect

Journal of the American Chemical Society ◽

10.1021/ja049570f ◽

2004 ◽

Vol 126 (19) ◽

pp. 6124-6134 ◽

Cited By ~ 95

Author(s):

Bin Zhao ◽

Richard T. Haasch ◽

Scott MacLaren

Keyword(s):

Molecular Weight ◽

Methyl Methacrylate ◽

Self Assembly ◽

Poly Methyl Methacrylate ◽

Weight Effect ◽

Silica Substrates

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Effect of Ferocene Concentration on the Percent Conversion and Molecular Weight of Poly(Methyl Methacrylate) Homopolymers

Baghdad Science Journal ◽

10.21123/bsj.14.2.311-319 ◽

2017 ◽

Vol 14 (2) ◽

pp. 311-319

Author(s):

Baghdad Science Journal

Keyword(s):

Molecular Weight ◽

Free Radical ◽

Methyl Methacrylate ◽

Benzoyl Peroxide ◽

Radical Polymerization ◽

Free Oxygen ◽

Poly Methyl Methacrylate ◽

Methacrylate Monomer ◽

Percent Conversion ◽

Methyl Methacrylate Monomer

This research is addressing the effect of different ferrocene concentration (0.00, 2.15x10-3, 4.30x10-3, 8.60x10-3, and 12.9x10-3) on the bulk free radical polymerization of methyl methacrylate monomer in benzene using benzoyl peroxide as initiator. The polymerization was conducted at 60º C under free oxygen atmosphere. The resulting polymers were characterized by FTIR. The results were compared with the presence and absence of ferrocene at 10% conversion. The %conversion was 3.04% with no ferrocene present in the polymerization medium and its increase to 9.06 with a first lowest ferrocene concentration added, i.e. 2.15 x10-3mol/l. This was positively reflected on the poly(methyl methacrylate) molecular weight measured by viscosity technique, especially in the presence of ferrocene.

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