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  1. Article ; Online: Dynamic Fracture Resistance under Plane Strain Conditions of High-Density Polyethylene Nanoclay Composites.

    López-Cabrera, H R / Figueroa-López, U / Taylor, A C / Guevara-Morales, A

    Polymers

    2023  Volume 15, Issue 4

    Abstract: Polymer nanoclay composites have received significant attention due to their substantially enhanced mechanical, thermal and barrier properties. However, the effect of these nanoclays on the dynamic fracture resistance of a polymer matrix during fast ... ...

    Abstract Polymer nanoclay composites have received significant attention due to their substantially enhanced mechanical, thermal and barrier properties. However, the effect of these nanoclays on the dynamic fracture resistance of a polymer matrix during fast fracture events has not been documented. In this study, the effect of nanoclay addition on the rapid crack propagation (RCP) resistance of high-density polyethylene (HDPE) was investigated through the high-speed double torsion test. Results showed that the addition of 1, 3, and 5% of nanoclays improved the dynamic fracture resistance under the plane strain conditions (Gd1) of HDPE up to 65%. An increase in the storage and loss modulus, and a decrease in crystallinity and melt flow index with nanoclay content was also found. Although the presence of agglomerates can hinder the enhancement of Gd1 as it promotes agglomerate fracture and debonding, the increase in energy consumption through fibrillation and crazing promoted by the nanoclay prevails, suggesting that the nanoclay's toughening effect that has been extensively reported under quasi-static and impact tests, is also present under RCP conditions, and that the HDPE nanocomposites could be used in applications in which RCP must be prevented.
    Language English
    Publishing date 2023-02-06
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527146-5
    ISSN 2073-4360 ; 2073-4360
    ISSN (online) 2073-4360
    ISSN 2073-4360
    DOI 10.3390/polym15040813
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Building leadership capacity to drive sustainable water management: the evaluation of a customised program.

    Taylor, A C

    Water science and technology : a journal of the International Association on Water Pollution Research

    2010  Volume 61, Issue 11, Page(s) 2797–2807

    Abstract: This paper describes a customised, six-month, leadership development program (LDP) that was designed for emerging leaders in the Australian water industry who were promoting sustainable urban water management (SUWM). It also presents results from an ... ...

    Abstract This paper describes a customised, six-month, leadership development program (LDP) that was designed for emerging leaders in the Australian water industry who were promoting sustainable urban water management (SUWM). It also presents results from an evaluation of the program's benefits, costs and overall 'return on investment' (ROI). The program was designed to help build emergent leadership capacity in the water industry, given strong evidence that this form of leadership plays an important role in advancing SUWM. It involved '360-degree feedback' processes, training, individual leadership development plans, and coaching sessions. Its design was informed by a review of the literature, and its content was informed by local empirical research involving effective SUWM leaders. The evaluation used a seven-tier assessment framework that examined different dimensions of the program's performance using source and methodological triangulation. The results indicate that such LDPs can produce a range of positive outcomes, such as promoting desired leadership behaviours and generating a positive ROI estimate. Specifically, the program's estimated ROI was approximately 190% after only one year. The primary conclusion is that evidence-based LDPs which are highly customised for specific types of leaders in the water industry represent a promising type of intervention to build forms of leadership capacity which are needed to successfully promote SUWM.
    MeSH term(s) Australia ; Conservation of Natural Resources/methods ; Environmental Monitoring/methods ; Leadership ; Program Development ; Staff Development/manpower ; Staff Development/organization & administration ; Water
    Chemical Substances Water (059QF0KO0R)
    Language English
    Publishing date 2010
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 764273-8
    ISSN 1996-9732 ; 0273-1223
    ISSN (online) 1996-9732
    ISSN 0273-1223
    DOI 10.2166/wst.2010.250
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Sustainable urban water management: understanding and fostering champions of change.

    Taylor, A C

    Water science and technology : a journal of the International Association on Water Pollution Research

    2009  Volume 59, Issue 5, Page(s) 883–891

    Abstract: This paper highlights and discusses ten characteristic attributes of emergent leaders (also known as 'champions') who worked as influential change agents within publicly managed, Australian water agencies to encourage more sustainable forms of urban ... ...

    Abstract This paper highlights and discusses ten characteristic attributes of emergent leaders (also known as 'champions') who worked as influential change agents within publicly managed, Australian water agencies to encourage more sustainable forms of urban water management. These attributes relate to: the 'openness to experience' personality characteristic; career mobility and work history demographics; personal and position power; strategic social networks; the culture of their organisations; and five distinguishing leadership behaviours (e.g. persisting under adversity). Guided by the findings of an international literature review, the author conducted a multiple case study involving six water agencies. This research identified attributes of these leaders that were typically strong and/or distinguishing compared to relevant control groups, as well as influential contextual factors. While it is widely acknowledged that these leaders play a critical role in the delivery of sustainable urban water management, there has been a paucity of context-sensitive research involving them. The research project highlighted in this paper is a response to this situation and has led to the development of a suite of 39 practical, evidence-based strategies to build leadership capacity throughout water agencies. Such capacity is one of the elements needed to drive the transition to more 'water sensitive cities'.
    MeSH term(s) Career Mobility ; City Planning/methods ; Humans ; Water Purification/methods ; Water Supply
    Language English
    Publishing date 2009
    Publishing country England
    Document type Journal Article
    ZDB-ID 764273-8
    ISSN 1996-9732 ; 0273-1223
    ISSN (online) 1996-9732
    ISSN 0273-1223
    DOI 10.2166/wst.2009.033
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  4. Article: Survival of rat skin and changes in hair pigmentation following freezing.

    TAYLOR, A C

    The Journal of experimental zoology

    2007  Volume 110, Issue 1, Page(s) 77–111

    MeSH term(s) Animals ; Freezing ; Hair ; Hair Color ; Pigmentation ; Rats ; Refrigeration
    Language English
    Publishing date 2007-12-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3181-1
    ISSN 1097-010X ; 0022-104X
    ISSN (online) 1097-010X
    ISSN 0022-104X
    DOI 10.1002/jez.1401100106
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  5. Article: The effect of rate of cooling on survival of frozen tissues.

    TAYLOR, A C

    Proceedings of the Royal Society of London. Series B, Biological sciences

    2003  Volume 147, Issue 929, Page(s) 466–475

    MeSH term(s) Cells ; Cold Temperature ; Freezing ; Humans
    Language English
    Publishing date 2003-10-03
    Publishing country England
    Document type Journal Article
    ZDB-ID 209242-6
    ISSN 1471-2954 ; 0950-1193 ; 0080-4649 ; 0962-8452
    ISSN (online) 1471-2954
    ISSN 0950-1193 ; 0080-4649 ; 0962-8452
    DOI 10.1098/rspb.1957.0066
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Microscopic observation of the living tooth pulp.

    TAYLOR, A C

    Science (New York, N.Y.)

    2003  Volume 111, Issue 2872, Page(s) 40

    MeSH term(s) Dental Pulp ; Humans ; Tooth
    Language English
    Publishing date 2003-05-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.111.2872.40
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  7. Article: The viability of isolated nerve fragments and its modification by methylene blue.

    WEISS, P / TAYLOR, A C

    Journal of cellular and comparative physiology

    2010  Volume 27, Page(s) 87–103

    MeSH term(s) Humans ; Methylene Blue ; Nerve Degeneration ; Regeneration
    Chemical Substances Methylene Blue (T42P99266K)
    Language English
    Publishing date 2010-06-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3117-3
    ISSN 0095-9898
    ISSN 0095-9898
    DOI 10.1002/jcp.1030270203
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  8. Article: Stages in the normal development of Rana pipiens larvae.

    TAYLOR, A C / KOLLROS, J J

    The Anatomical record

    2010  Volume 94, Page(s) 7–13

    MeSH term(s) Animals ; Embryology ; Larva ; Rana pipiens
    Language English
    Publishing date 2010-10-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 203685-x
    ISSN 0003-276X
    ISSN 0003-276X
    DOI 10.1002/ar.1090940103
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  9. Article: Mechanical and dielectric properties of epoxy–clay nanocomposites

    Guevara-Morales, A / Taylor, A. C

    Journal of materials science. 2014 Feb., v. 49, no. 4

    2014  

    Abstract: Epoxy–clay nanocomposites were prepared using two types of surface-treated montmorillonite (Closite 30B and Nanomer I28E). Wide angle X-ray scattering showed that all the nanocomposites had an intercalated structure. Improvements in tensile and fracture ... ...

    Abstract Epoxy–clay nanocomposites were prepared using two types of surface-treated montmorillonite (Closite 30B and Nanomer I28E). Wide angle X-ray scattering showed that all the nanocomposites had an intercalated structure. Improvements in tensile and fracture properties were found. The pure epoxy polymer was very brittle with a fracture energy, Gc, of 131 J m⁻². The addition of the nanoclays significantly increased the value of Gc, up to 240 J m⁻²for 5 wt% C30B. The toughening mechanisms acting in the nanocomposites were identified using scanning electron microscopy as crack deflection and plastic deformation of the epoxy matrix around the clay platelets following debonding. From electrical testing, the permittivity and loss angle of the nanocomposites decreased, and their breakdown strength increased as desired for insulation applications. The breakdown strength of the pure epoxy was found to be 11.7 kV mm⁻¹, while for a 2 wt% C30B nanocomposite, it increased to 14.7 kV mm⁻¹. It was concluded that the restriction of chain mobility inhibited electrical polarisation and thus decreased the permittivity and loss angle. The electrical damage zone was analysed using scanning electron microscopy. It was found that the higher resistance-to-surface degradation by partial discharges and the creation of a tortuous electrical path, which delayed the propagation of the electrical tree, were the main factors which improved the breakdown strengths of the nanocomposites.
    Keywords X-radiation ; clay ; dielectric properties ; energy ; epoxides ; insulating materials ; montmorillonite ; nanoclays ; nanocomposites ; plastic deformation ; polymers ; scanning electron microscopy
    Language English
    Dates of publication 2014-02
    Size p. 1574-1584.
    Publishing place Springer-Verlag
    Document type Article
    ZDB-ID 2015305-3
    ISSN 1573-4803 ; 0022-2461
    ISSN (online) 1573-4803
    ISSN 0022-2461
    DOI 10.1007/s10853-013-7840-5
    Database NAL-Catalogue (AGRICOLA)

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  10. Article: The microstructure and fracture performance of styrene–butadiene–methylmethacrylate block copolymer-modified epoxy polymers

    Chong, H. M / Taylor, A. C

    Journal of materials science. 2013 Oct., v. 48, no. 19

    2013  

    Abstract: The microstructure and fracture performance of an anhydride-cured epoxy polymer modified with two poly(styrene)-b-1,4-poly(butadiene)-b-poly(methyl methacrylate) (SBM) block copolymers were investigated in bulk form, and when used as the matrix material ... ...

    Abstract The microstructure and fracture performance of an anhydride-cured epoxy polymer modified with two poly(styrene)-b-1,4-poly(butadiene)-b-poly(methyl methacrylate) (SBM) block copolymers were investigated in bulk form, and when used as the matrix material in carbon fibre reinforced composites. The ‘E21’ SBM block copolymer has a higher butadiene content and molecular weight than the ‘E41’. A network of aggregated spherical micelles was observed for the E21 SBM modified epoxy, which became increasingly interconnected as the SBM content was increased. A steady increase in the fracture energy was measured with increasing E21 content, from 96 to 511 J/m²for 15 wt% of E21. Well-dispersed ‘raspberry’-like SBM particles, with a sphere-on-sphere morphology of a poly(styrene) core covered with poly(butadiene) particles, in an epoxy matrix were obtained for loadings up to 7.5 wt% of E41 SBM. This changed to a partially phase-inverted structure at higher E41 contents, accompanied by a significant jump in the measured fracture energy to 1032 J/m²at 15 wt% of E41. The glass transition temperatures remained unchanged with the addition of SBM, indicating a complete phase separation. Electron microscopy and cross polarised transmission optical microscopy revealed localised shear band yielding, debonding and void growth as the main toughening mechanisms. Significant improvements in fracture energy were not observed in the fibre composites, indicating poor toughness transfer from the bulk to the composite. The fibre bridging observed for the unmodified epoxy matrix was reduced due to better fibre–matrix adhesion. The size of the crack tip deformation zone in the composites was restricted by the fibres, hence reducing the measured fracture energy compared to the bulk for the toughest matrix materials.
    Keywords adhesion ; carbon fibers ; composite polymers ; deformation ; electron microscopy ; energy ; epoxides ; glass transition ; micelles ; microstructure ; molecular weight ; separation ; styrene ; temperature
    Language English
    Dates of publication 2013-10
    Size p. 6762-6777.
    Publishing place Springer-Verlag
    Document type Article
    ZDB-ID 2015305-3
    ISSN 1573-4803 ; 0022-2461
    ISSN (online) 1573-4803
    ISSN 0022-2461
    DOI 10.1007/s10853-013-7481-8
    Database NAL-Catalogue (AGRICOLA)

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