ABSTRACT In this work we demonstrate that aqueous hydrogen peroxide is an effective reagent for c... more ABSTRACT In this work we demonstrate that aqueous hydrogen peroxide is an effective reagent for chain scissioning or vis-breaking of polypropylene during melt-processing to produce controlled rheology product. The novel process involves the direct injection of aqueous hydrogen peroxide into the polypropylene melt under pressure. The polypropylene produced has reduced molar mass, narrowed molar mass distribution), and is indistinguishable in terms of melt flow rate, molar mass distribution, crystallinity and melt rheology from conventionally vis-broken polypropylene produced using an organic peroxide (2,5-dimethyl-2,5-di-tert-butylperoxyhexane (DHBP)). However, the polypropylene produced in the current process is notably free of the organic volatiles formed as by-products in the case of organic peroxides such as DHBP.
International Journal of Greenhouse Gas Control, 2015
ABSTRACT Nesquehonite (MgCO3·3H2O) has in the past been proposed as a low-cost, long-term mineral... more ABSTRACT Nesquehonite (MgCO3·3H2O) has in the past been proposed as a low-cost, long-term mineral host for CO2. Here, stability of the phase was investigated under low temperatures (50 °C, 100 °C), moderate water vapour pressures (pH2O = 0.02–0.04 atm) and in both open and closed experimental systems. Specifically, this study explores CO2 storage security in nesquehonite exposed to (1) atmospheric humidity, (2) self-generated humidity, and (3) humidity in simulated flue gases during ex situ carbonation. Both CO2 and N2 were used as carrier gases for H2O vapour to establish the influence of CO2 on nesquehonite decomposition under humid conditions.
ABSTRACT In this work we demonstrate that aqueous hydrogen peroxide is an effective reagent for c... more ABSTRACT In this work we demonstrate that aqueous hydrogen peroxide is an effective reagent for chain scissioning or vis-breaking of polypropylene during melt-processing to produce controlled rheology product. The novel process involves the direct injection of aqueous hydrogen peroxide into the polypropylene melt under pressure. The polypropylene produced has reduced molar mass, narrowed molar mass distribution), and is indistinguishable in terms of melt flow rate, molar mass distribution, crystallinity and melt rheology from conventionally vis-broken polypropylene produced using an organic peroxide (2,5-dimethyl-2,5-di-tert-butylperoxyhexane (DHBP)). However, the polypropylene produced in the current process is notably free of the organic volatiles formed as by-products in the case of organic peroxides such as DHBP.
Composites based on (3-methacryloyloxypropyl)trimethoxysilane and 2-hydroxyethylmethacrylate have... more Composites based on (3-methacryloyloxypropyl)trimethoxysilane and 2-hydroxyethylmethacrylate have been prepared and their properties are studied. Chemical structure of the materials made by a range of synthetic approaches was defined using nuclear magnetic resonance spectroscopy and gel permeation chromatography. Thermal properties such as glass transition temperature of the systems were determined. The inorganic phase content was measured after the samples were decomposed
Australian Journal of Chemistry - AUST J CHEM, 1995
... Eva M. Campi, Jana Habsuda, W. Roy Jackson, Catrin AM Jonasson and Quentin J. McCubbin Depart... more ... Eva M. Campi, Jana Habsuda, W. Roy Jackson, Catrin AM Jonasson and Quentin J. McCubbin Department of Chemistry, Monash University, Clayton, Vic. 3168. ... XLII The amines were purchased from Aldrich (prop-2-enylamine) or prepared from the corresponding alc~hols.'~ ...
ABSTRACT Synthetic graphite–phenolic nanocomposites were designed and synthesized with a composit... more ABSTRACT Synthetic graphite–phenolic nanocomposites were designed and synthesized with a compositional gradient which is shown to influence transient temperature fields during rapid temperature changes. Such nanocomposites were fabricated using a compression moulding technique, and thermal conductivity and heat capacity of nanocomposites were experimentally determined using a modified transient plane source technique over a wide temperature range from 253.15 to 373.15 K. The effects of four compositional gradient configurations on the transient temperature field across the thickness of a nanocomposite plate, at a high imposed temperature, was investigated. The transient time and temperature fields in nanocomposite structures were highly affected by the compositional gradient configurations.
Journal of Polymer Science Part A: Polymer Chemistry, 2001
... J. Habsuda 1,* ,; GP Simon 1 ,; Y.-B. Cheng 1 ,; DG Hewitt 2 ,; H. Toh 3 ,; DR Diggins 3. ...... more ... J. Habsuda 1,* ,; GP Simon 1 ,; Y.-B. Cheng 1 ,; DG Hewitt 2 ,; H. Toh 3 ,; DR Diggins 3. ... How to Cite. Habsuda, J., Simon, GP, Cheng, Y.-B., Hewitt, DG, Toh, H. and Diggins, DR (2001), Chemical structure of composites derived from poly(silicic acid) and 2-hydroxyethylmethacrylate ...
ABSTRACT Composition-controlled carbon nanofiber/phenolic nanocomposites were designed and fabric... more ABSTRACT Composition-controlled carbon nanofiber/phenolic nanocomposites were designed and fabricated using a combination of powder stacking and compression molding techniques. The microstructure and composition distribution were evaluated. Experiments showed that their thermomechanical and viscoelastic properties were highly influenced by compositional gradient patterns of the nanocomposites. Electrical and thermal properties were able to be controlled from the surface to the core of the nanocomposites.
Composites Part A: Applied Science and Manufacturing, 2013
ABSTRACT Carbon nanofibre (CNF)/phenolic nanocomposite coatings were applied to the phenolic subs... more ABSTRACT Carbon nanofibre (CNF)/phenolic nanocomposite coatings were applied to the phenolic substrate for tailoring thermal behaviour under rapid temperature changes. A finite element (FE) model was developed in this work for transient thermal analysis of coated samples. The effects of thickness and CNF content of the CNF/phenolic nanocomposite coating on reducing temperature gradient field within the samples as well as transient time to steady state were investigated. Temperature-dependent thermal properties including thermal conductivity and heat capacity of phenolic and its nanocomposites containing 2, 4 and 16 wt% CNF were experimentally determined and employed in the FE analysis. The results showed that the temperature gradient field and transient time within the polymers can significantly be decreased by using a CNF/phenolic nanocomposite coating.
ABSTRACT In this work we demonstrate that aqueous hydrogen peroxide is an effective reagent for c... more ABSTRACT In this work we demonstrate that aqueous hydrogen peroxide is an effective reagent for chain scissioning or vis-breaking of polypropylene during melt-processing to produce controlled rheology product. The novel process involves the direct injection of aqueous hydrogen peroxide into the polypropylene melt under pressure. The polypropylene produced has reduced molar mass, narrowed molar mass distribution), and is indistinguishable in terms of melt flow rate, molar mass distribution, crystallinity and melt rheology from conventionally vis-broken polypropylene produced using an organic peroxide (2,5-dimethyl-2,5-di-tert-butylperoxyhexane (DHBP)). However, the polypropylene produced in the current process is notably free of the organic volatiles formed as by-products in the case of organic peroxides such as DHBP.
International Journal of Greenhouse Gas Control, 2015
ABSTRACT Nesquehonite (MgCO3·3H2O) has in the past been proposed as a low-cost, long-term mineral... more ABSTRACT Nesquehonite (MgCO3·3H2O) has in the past been proposed as a low-cost, long-term mineral host for CO2. Here, stability of the phase was investigated under low temperatures (50 °C, 100 °C), moderate water vapour pressures (pH2O = 0.02–0.04 atm) and in both open and closed experimental systems. Specifically, this study explores CO2 storage security in nesquehonite exposed to (1) atmospheric humidity, (2) self-generated humidity, and (3) humidity in simulated flue gases during ex situ carbonation. Both CO2 and N2 were used as carrier gases for H2O vapour to establish the influence of CO2 on nesquehonite decomposition under humid conditions.
ABSTRACT In this work we demonstrate that aqueous hydrogen peroxide is an effective reagent for c... more ABSTRACT In this work we demonstrate that aqueous hydrogen peroxide is an effective reagent for chain scissioning or vis-breaking of polypropylene during melt-processing to produce controlled rheology product. The novel process involves the direct injection of aqueous hydrogen peroxide into the polypropylene melt under pressure. The polypropylene produced has reduced molar mass, narrowed molar mass distribution), and is indistinguishable in terms of melt flow rate, molar mass distribution, crystallinity and melt rheology from conventionally vis-broken polypropylene produced using an organic peroxide (2,5-dimethyl-2,5-di-tert-butylperoxyhexane (DHBP)). However, the polypropylene produced in the current process is notably free of the organic volatiles formed as by-products in the case of organic peroxides such as DHBP.
Composites based on (3-methacryloyloxypropyl)trimethoxysilane and 2-hydroxyethylmethacrylate have... more Composites based on (3-methacryloyloxypropyl)trimethoxysilane and 2-hydroxyethylmethacrylate have been prepared and their properties are studied. Chemical structure of the materials made by a range of synthetic approaches was defined using nuclear magnetic resonance spectroscopy and gel permeation chromatography. Thermal properties such as glass transition temperature of the systems were determined. The inorganic phase content was measured after the samples were decomposed
Australian Journal of Chemistry - AUST J CHEM, 1995
... Eva M. Campi, Jana Habsuda, W. Roy Jackson, Catrin AM Jonasson and Quentin J. McCubbin Depart... more ... Eva M. Campi, Jana Habsuda, W. Roy Jackson, Catrin AM Jonasson and Quentin J. McCubbin Department of Chemistry, Monash University, Clayton, Vic. 3168. ... XLII The amines were purchased from Aldrich (prop-2-enylamine) or prepared from the corresponding alc~hols.'~ ...
ABSTRACT Synthetic graphite–phenolic nanocomposites were designed and synthesized with a composit... more ABSTRACT Synthetic graphite–phenolic nanocomposites were designed and synthesized with a compositional gradient which is shown to influence transient temperature fields during rapid temperature changes. Such nanocomposites were fabricated using a compression moulding technique, and thermal conductivity and heat capacity of nanocomposites were experimentally determined using a modified transient plane source technique over a wide temperature range from 253.15 to 373.15 K. The effects of four compositional gradient configurations on the transient temperature field across the thickness of a nanocomposite plate, at a high imposed temperature, was investigated. The transient time and temperature fields in nanocomposite structures were highly affected by the compositional gradient configurations.
Journal of Polymer Science Part A: Polymer Chemistry, 2001
... J. Habsuda 1,* ,; GP Simon 1 ,; Y.-B. Cheng 1 ,; DG Hewitt 2 ,; H. Toh 3 ,; DR Diggins 3. ...... more ... J. Habsuda 1,* ,; GP Simon 1 ,; Y.-B. Cheng 1 ,; DG Hewitt 2 ,; H. Toh 3 ,; DR Diggins 3. ... How to Cite. Habsuda, J., Simon, GP, Cheng, Y.-B., Hewitt, DG, Toh, H. and Diggins, DR (2001), Chemical structure of composites derived from poly(silicic acid) and 2-hydroxyethylmethacrylate ...
ABSTRACT Composition-controlled carbon nanofiber/phenolic nanocomposites were designed and fabric... more ABSTRACT Composition-controlled carbon nanofiber/phenolic nanocomposites were designed and fabricated using a combination of powder stacking and compression molding techniques. The microstructure and composition distribution were evaluated. Experiments showed that their thermomechanical and viscoelastic properties were highly influenced by compositional gradient patterns of the nanocomposites. Electrical and thermal properties were able to be controlled from the surface to the core of the nanocomposites.
Composites Part A: Applied Science and Manufacturing, 2013
ABSTRACT Carbon nanofibre (CNF)/phenolic nanocomposite coatings were applied to the phenolic subs... more ABSTRACT Carbon nanofibre (CNF)/phenolic nanocomposite coatings were applied to the phenolic substrate for tailoring thermal behaviour under rapid temperature changes. A finite element (FE) model was developed in this work for transient thermal analysis of coated samples. The effects of thickness and CNF content of the CNF/phenolic nanocomposite coating on reducing temperature gradient field within the samples as well as transient time to steady state were investigated. Temperature-dependent thermal properties including thermal conductivity and heat capacity of phenolic and its nanocomposites containing 2, 4 and 16 wt% CNF were experimentally determined and employed in the FE analysis. The results showed that the temperature gradient field and transient time within the polymers can significantly be decreased by using a CNF/phenolic nanocomposite coating.
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