Determination of End Group Functionality in Poly(methyl methacrylate) Macromonomers by Pyrolysis Simultaneous Multidetection Gas Chromatography

Ohtani, Hajime; Luo, Yuan Fang; Nakashima, Yoko; Tsukahara, Yasuhisa; Tsuge, Shin

doi:10.1021/ac00081a012

Cited by 23 publications

(18 citation statements)

References 16 publications

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“…Both PS and PMMA are well-known to have highly depolymerizing natures to the monomer at elevated temperatures around 500°C for Py-GC measurements. [5][6][7][8][9][10][11][12] As was anticipated, the main pyrolysis products on the pyrogram of the copolymer were St and MMA monomers (ca. 93%).…”

Section: Sec Measurementssupporting

confidence: 61%

“…12 The NEW END-GROUP ANALYSIS OF ST-MMA COPOLYMERS 1, although the former structure might be mostly formed by the recombination termination between a propagating PMMA chain and an isobutyronitrile radical rather than by the initiation reaction. 17 Among these, 2,3-dicyano-2,3-dimethylbutane (Peak 5) might be attributed to a recombination product of isobutyronitrile radicals formed from the remaining AIBN in the polymer sample because it was also observed on the pyrogram of AIBN alone with a fairly strong intensity.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

A novel approach to the characterization of end groups in styrene-methyl methacrylate copolymers by pyrolysis-gas chromatography

Ohtani

Suzuki

Tsuge

2000

J. Polym. Sci. A Polym. Chem.

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Section: Sec Measurementssupporting

confidence: 61%

Section: Resultsmentioning

confidence: 99%

A novel approach to the characterization of end groups in styrene-methyl methacrylate copolymers by pyrolysis-gas chromatography

Ohtani

Suzuki

Tsuge

2000

J. Polym. Sci. A Polym. Chem.

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“…The product was dried in vacuum at 50°C over night. [26][27][28][29] The number average molecular weight (M n ) of the products could not only be determined by GPC, but also by titrating with 0.02 mol L -1 KOH alcohol solution, using phenolphthalein as an indicator. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 …”

Section: Synthesis Of Carboxyl-terminated Pmma (Pmma-cooh)mentioning

confidence: 99%

Synthesis of Reactive Comb Polymers and Their Applications as a Highly Efficient Compatibilizer in Immiscible Polymer Blends

Dong

Wang

et al. 2015

Ind. Eng. Chem. Res.

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Reactive comb (RC) polymers were synthesized by copolymerizing methyl methacrylate (MMA) with glycidyl methacrylate (GMA) and a kind of MMA macromer. The obtained molecules had both epoxide groups and long PMMA side chains distributed randomly along the PMMA backbone. The synthesized RC polymers were applied as compatibilizers in an immiscible poly(L-lactic acid)/poly(vinylidene fluoride) (PLLA/PVDF) system. Compared to their linear counterparts, only 1 wt% of RC polymers with appropriate length of side chains significantly reduced the size and enhanced the uniformity of the PVDF dispersed phase in PLLA matrix and the RC-compatibilized blends exhibited a significant improvement in fracture strain. The higher compatibilization efficiency of RC polymers was ascribed to the existence of PMMA side chains, which improved the stability of RC polymers at the interface of immiscible blend and this was demonstrated by TEM.

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“…PMMA is routinely produced by free radical polymerization (producer does not provide details on the polymerization method) and usually contains saturated or unsaturated (vinyl) moieties at the chain ends; however, in general, some initiator residue can also be found, and other groups randomly appear as a result of the chain transfer reaction [29][30][31].…”

Section: Characteristics Of Neat Pmmamentioning

confidence: 99%

Nano-Mechanical Properties of Modified Poly(Methyl Methacrylate) Films Studied by Atomic Force Microscopy

Kaczmarek

Gałka

2010

Tribol Lett

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Atomic force microscopy (AFM) has been used to study the effect of various photoinitiators doped into poly(methyl methacrylate) (PMMA) on the mechanical properties of PMMA films at the nanometer scale. Pure and modified PMMA films (containing four different photoinitiators) were exposed to a mercury vapor lamp in air atmosphere. Force-distance curves for hardness, Young modulus, and adhesion forces were obtained using different AFM modes (tapping or contact-mode) and different tips (diamond or silicon nitride). The results revealed that the added photoinitiators slightly changed the nanomechanical properties of PMMA as a result of alterations in the photochemical reactions and physical processes occurring in the studied systems. tert-Butyl peroxybenzoate had the most efficient effect on the measured parameters in UV-irradiated PMMA, whereas benzoyl peroxide was less active. The mechanism of the observed processes is discussed.

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Determination of End Group Functionality in Poly(methyl methacrylate) Macromonomers by Pyrolysis Simultaneous Multidetection Gas Chromatography

Cited by 23 publications

References 16 publications

A novel approach to the characterization of end groups in styrene-methyl methacrylate copolymers by pyrolysis-gas chromatography

A novel approach to the characterization of end groups in styrene-methyl methacrylate copolymers by pyrolysis-gas chromatography

Synthesis of Reactive Comb Polymers and Their Applications as a Highly Efficient Compatibilizer in Immiscible Polymer Blends

Nano-Mechanical Properties of Modified Poly(Methyl Methacrylate) Films Studied by Atomic Force Microscopy

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