Thermal degradation studies on PMMA–HET acid based oligoesters blends

Rajkumar, T.; Vijayakumar, Chinnaswamy Thangavel; Sivasamy, P.; Sreedhar, B.; Wilkie, Charles A.

doi:10.1007/s10973-009-0266-2

Cited by 28 publications

(10 citation statements)

References 30 publications

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“…Probably, this phenomenon is correlated to the thermal-induced degradation of the PMMA layer at high temperature. The degradation pathway of this polymer 78,79 depends upon the way the energy is released in the macromolecular film. Under deep UV, X-ray particle beams, or high temperature (with respect to the melting one) thermal processes, this polymer degrades via a random scission mechanism giving rise to many main chain scissions (and subsequent decrease of the molecular weight), increase of the number of double bonds, and release of simple gaseous molecular species such as H 2 , CH 4 , CO, CO 2 , CH 3 OH, and HCOOCH 3 (methyl formate).…”

Section: Discussion On the Dewetting And Unzipping Mechanismsmentioning

confidence: 99%

Patterning of templated-confined nanoscale Au films by thermal-induced dewetting process of a poly(methylmethacrylate) underlying layer

Ruffino

Torrisi

Marletta

et al. 2012

Journal of Applied Physics

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In this work, we propose a new approach to prepare surface micro-patterns in nanoscale deposited Au films. In particular, we exploit the idea to use a template confined dewetting aging not directly on the deposited Au film but on an underlying poly(methylmethacrylate) (PMMA) substrate by thermal processes. The idea consists of the following basic concepts: (a) to perform nanoscale Au film deposition assisted by micrometric templates to obtain a template confined film and (b) by low-temperature thermal processes (<400 °C) to induce a dewetting process of the PMMA to guide specific patterning effects in the top nanoscale Au film. In this approach, the Au surface pattern order is established by the template confined deposition on a micrometric scale (which is a highly efficient way to synthesize metallic surface patterns with controllable structures, large pattern areas, and to achieve a high throughput), while the realization and control of the Au surface pattern is given by the control of the dewetting process of the underlying substrate, without invoking high temperature thermal processes. We illustrate experimental results of such an approach, and we propose it as a model methodology for surface large scale micro-patterning of nanoscale metal films which can be applied to a wide range of systems towards device applications (i.e., plasmonics).

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Section: Discussion On the Dewetting And Unzipping Mechanismsmentioning

confidence: 99%

Patterning of templated-confined nanoscale Au films by thermal-induced dewetting process of a poly(methylmethacrylate) underlying layer

Ruffino

Torrisi

Marletta

et al. 2012

Journal of Applied Physics

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“…About 3–5 mg of the sample was heated at a heating rate of 10 °C min −1 from ambient to 600 °C in an inert nitrogen atmosphere. Energy of activation was also computed from the TG results using Dharwadkar and Kharkhanavala equation 2, 25, 32, 33…”

Section: Methodsmentioning

confidence: 99%

“…PMMA, the plexi/acrylic glass is a transparent and colorless material 1. PMMA sheet of 1 cm thickness transmits about 79% of visible light radiation in the wavelength range of 400–800 nm 2. Like ordinary window glass, PMMA does not allow the passage of ultraviolet light.…”

Section: Introductionmentioning

confidence: 99%

“…In our previous published works, authors reported the procedure to synthesize HET acid (chlorendic acid) based halogenated oligoesters25 by condensing chlorendic acid with four different aliphatic diols such as ethylene glycol (EG), 1,2‐propane diol, 1,3‐propane diol and 1,4‐butane diol. And they studied the effect of chlorinated products formed during the degradation of loaded oligoesters in the PMMA matrix on the thermal stability of PMMA using differential scanning calorimetric (DSC), TG/FTIR and on‐line pyrolysis GC‐MS 2. The heat of decomposition from DSC studies and thermal stability, the mass loss rate and the energy of activation from TG studies for the major degradation were assessed and showed that PMMA containing HET‐EG oligoester was thermally more stable than other blends.…”

Section: Introductionmentioning

confidence: 99%

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Chlorinated thermal stabilizer for optically clear PMMA

Rajkumar¹,

Sivasamy²,

Sreedhar

et al. 2011

Polymers for Advanced Techs

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Optically clear poly(methyl methacrylate) (PMMA) blends with HET‐EG oligoester (synthesized by condensation of chlorendic acid with ethylene glycol) at six different compositions were prepared by bulk polymerization. The effect of HET‐EG in the PMMA matrix on the optical clarity of PMMA blend was measured using ultraviolet‐visible spectroscopic study. The thermal stability of PMMA blends was investigated using differential scanning calorimetric (DSC) and thermogravimetric (TG) analyses. The parameters to deduce the thermal stability of pure PMMA and PMMA blends were calculated from DSC and TG results. The thermal stability of PMMA was found to increase effectively by loading 5% of HET‐EG oligoester without marring optical clarity. The probable physical and chemical actions of HET‐EG oligoester on the thermal stability of PMMA are discussed. Copyright © 2011 John Wiley & Sons, Ltd.

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“…One of such methods of modifying high-molecular compounds consists in preparing polymer blends [1][2][3][4][5][6][7][8][9][10][11]. The properties of elastomeric materials obtained by non-conventional cross-linking elastomer blends have been examined for a long time at the Technical University of Łódź [1].…”

Section: Introductionmentioning

confidence: 99%

Thermal properties and combustibility of cross-linked XNBR/CSM blends

Janowska

Kucharska-Jastrząbek

Rzymski

et al. 2011

J Therm Anal Calorim

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The article describes the measurements results of the thermal properties of cross-linked blends of butadiene-acrylonitrile rubber (XNBR, Krynac X.7.50) and chlorosulfonated polyethylene containing different quantity of combined chlorine (CSM24-Hypalon 48, CSM29-Hypalon 20, CSM35-Hypalon 40, and CSM43-Hypalon 30) under inert gas (DSC) and in air (derivatography). The blends were non-conventionally cross linked at a temperature of 150°C by means of MgO in the presence of stearic acid. The thermal curves obtained were interpreted from the point of view of phase transitions and chemical reactions of the macromolecular components used. It has been found that the elastomers investigated show a good compatibility brought about by the formation of both interpolymeric covalent bonds and interpolymeric and intrapolymeric ionic bridges, which play the role of a chemical compatibilizer. The results of the examinations performed show that the non-conventional cross-linked XNBR/CSM blends prove very good mechanical properties and are self-extinguished in air. Their flammability defined with the value of OI and combustion time in air clearly depends on the type of CSM.

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Thermal degradation studies on PMMA–HET acid based oligoesters blends

Cited by 28 publications

References 30 publications

Patterning of templated-confined nanoscale Au films by thermal-induced dewetting process of a poly(methylmethacrylate) underlying layer

Patterning of templated-confined nanoscale Au films by thermal-induced dewetting process of a poly(methylmethacrylate) underlying layer

Chlorinated thermal stabilizer for optically clear PMMA

Thermal properties and combustibility of cross-linked XNBR/CSM blends

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