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Article
Publication date: 1 June 2000

Lijun Qiao, Allan J. Easteal, Clive J. Bolt, Philip K. Coveny and Robert A. Franich

Four different approaches were taken to improve the water resistance of poly(vinyl acetate) (PVAc) emulsion adhesives. The improved wood adhesives were tested according to the ISO…

1551

Abstract

Four different approaches were taken to improve the water resistance of poly(vinyl acetate) (PVAc) emulsion adhesives. The improved wood adhesives were tested according to the ISO 9020 standard. Tensile storage modulus (E’) and glass transition temperature of the polymer films were measured using dynamic mechanical thermal analysis to quantify the influence of different approaches on those variables. Gel fraction and swelling ratio of the polymer film were measured to evaluate internal crosslink density. The experimental results showed that blending melamine/urea/formaldehyde (MUF) resin with PVAc emulsions modified the water resistance considerably and the film had a high E’ since an interpenetrating network‐type structure was formed in the polymer. The advantages and limitations of each modification were assessed on the basis of comparison of the results.

Details

Pigment & Resin Technology, vol. 29 no. 3
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 1 December 1999

Lijun Qiao, Allan J. Easteal, Clive J. Bolt, Philip K. Coveny and Robert A. Franich

Fillers with different chemical properties were used to study their effects on poly(vinyl acetate) (PVAc) emulsion wood adhesives. The elastoplastic behaviour of the filler…

592

Abstract

Fillers with different chemical properties were used to study their effects on poly(vinyl acetate) (PVAc) emulsion wood adhesives. The elastoplastic behaviour of the filler treated PVAc emulsions was studied using differential scanning calorimetry and dynamic mechanical thermal analysis. The results show that the glass transition temperature (Tg) of the polymer is not changed significantly by the addition of the fillers, while the tensile modulus is changed together with the hardness and stiffness. The viscosity of the emulsions and their performance on wood surfaces are greatly affected by fillers. Fillers with high oil‐absorption capacity increase viscosity to a greater extent. The acidity of the fillers influences the setting time for bonding of the emulsions to wood, and the water resistance, since some chemical reactions can take place during curing.

Details

Pigment & Resin Technology, vol. 28 no. 6
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 1 August 2000

Lijun Qiao, Allan J. Easteal, Clive J. Bolt, Philip K. Coveny and Robert A. Franich

Poly (vinyl acetate)‐based emulsion polymer/isocyanates (EPI) structural wood adhesives were prepared and their performance benchmark tested according to the specifications of the…

Abstract

Poly (vinyl acetate)‐based emulsion polymer/isocyanates (EPI) structural wood adhesives were prepared and their performance benchmark tested according to the specifications of the Japanese JAS‐111 standard. The changes of the glass transition temperature of the cured emulsions relative to unmodified poly(vinyl acetate) emulsion, measured using differential scanning calorimetry, indicated the chemical structure changes resulting from modification of poly(vinyl acetate) emulsion. The EPI adhesives showed excellent water resistance and near‐colourless gluelines in wood joints, ease of application and additional significant advantages over other types of wood adhesives. The performance test results are interpreted on the basis of the viscoelastic behaviour of free‐standing adhesive films. Other types of crosslinkers were used in the study to compare with the isocyanate hardeners.

Details

Pigment & Resin Technology, vol. 29 no. 4
Type: Research Article
ISSN: 0369-9420

Keywords

Book part
Publication date: 10 August 2015

Nicholas Hoover Wilson

This paper considers the East India Company’s emergence as a territorial power from the 1760s until the revocation of most of its commercial functions in 1834. While this period…

Abstract

This paper considers the East India Company’s emergence as a territorial power from the 1760s until the revocation of most of its commercial functions in 1834. While this period has been a key episode for historians of the British Empire and of South Asia, social scientists have struggled with the Company’s ambiguous nature. In this paper, I propose that a profitable way to grasp the Company’s transformation is to consider it as a global strategic action field. This perspective clarifies two key processes in the Company’s transition: the enlargement of its territorial possessions; and the increased exposure of its patrimonial network to intervention from British metropolitan politics. To further suggest the utility of this analytic perspective, I synthesize evidence from various sources, including data concerning the East India Court of Directors and the career histories of Company servants in two of its key administrative regions, Bengal and Madras, during this period of transition.

Details

Chartering Capitalism: Organizing Markets, States, and Publics
Type: Book
ISBN: 978-1-78560-093-7

Keywords

Article
Publication date: 1 April 1981

K.C. HARRISON

Other administrators of distinction have edited professional journals ably over several years. None has served under four companies over a decade as did the former City Librarian…

Abstract

Other administrators of distinction have edited professional journals ably over several years. None has served under four companies over a decade as did the former City Librarian of Westminster. The bright covers, broad interests and fresh writing of Harrison's LW did much to extend the professional dialogue in the years of Roberts, Parry and Dainton. Here Harrison discusses the typical difficulties and the satisfaction of the professional gatekeeper.

Details

Library Review, vol. 30 no. 4
Type: Research Article
ISSN: 0024-2535

Article
Publication date: 1 January 1976

The Howard Shuttering Contractors case throws considerable light on the importance which the tribunals attach to warnings before dismissing an employee. In this case the tribunal…

Abstract

The Howard Shuttering Contractors case throws considerable light on the importance which the tribunals attach to warnings before dismissing an employee. In this case the tribunal took great pains to interpret the intention of the parties to the different site agreements, and it came to the conclusion that the agreed procedure was not followed. One other matter, which must be particularly noted by employers, is that where a final warning is required, this final warning must be “a warning”, and not the actual dismissal. So that where, for example, three warnings are to be given, the third must be a “warning”. It is after the employee has misconducted himself thereafter that the employer may dismiss.

Details

Managerial Law, vol. 19 no. 1
Type: Research Article
ISSN: 0309-0558

Book part
Publication date: 9 November 2017

Sizwe Timothy Phakathi

This chapter examines and discusses the unintended outcomes of the production bonus scheme the mine had instituted to motivate and increase the productivity of the frontline…

Abstract

This chapter examines and discusses the unintended outcomes of the production bonus scheme the mine had instituted to motivate and increase the productivity of the frontline mining teams. This is crucial given that the maladministration of the bonus system could lead to a range of undesired outcomes such as deteriorating levels of trust between management and frontline workers, prioritisation of production at the expense of safety, poor work relations and ultimately low levels of organisational, employee and team performance. There are a number of organisational, management and labour factors that can render a production bonus scheme effective or ineffective. These factors influence the nature and extent of worker reactions to the bonus scheme.

This chapter examines and discusses the factors that influenced the reaction of the mining teams to the team-based production bonus scheme and the extent to which mine management fulfilled its side of the bargain in the implementation of the production bonus. The chapter highlights the manner in which the team-based bonus system influenced teams of stope workers to engage in their informal organisational practice of making plan (planisa) in order to offset the snags that jeopardised their prospects of earning the production bonus. The chapter reveals that, to a large extent, the productivity bonus generated conflict rather than cooperation at the point of production down the mine. As a result, the incentive scheme failed to live up to expectations by not eliciting the desired levels of organisational, worker and team performance at the rock-face.

Details

Production, Safety and Teamwork in a Deep-Level Mining Workplace
Type: Book
ISBN: 978-1-78714-564-1

Keywords

Article
Publication date: 1 March 1972

Food—national dietary standards—is a sensitive index of socio‐economic conditions generally; there are others, reflecting different aspects, but none more sensitive. A country…

Abstract

Food—national dietary standards—is a sensitive index of socio‐economic conditions generally; there are others, reflecting different aspects, but none more sensitive. A country that eats well has healthy, robust people; the housewife who cooks hearty, nourishing meals has a lusty, virile family. It is not surprising, therefore, that all governments of the world have a food policy, ranking high in its priorities and are usually prepared to sacrifice other national policies to preserve it. Before the last war, when food was much less of an instrument of government policy than now—there were not the shortages or the price vagaries—in France, any government, whatever its colour, which could not keep down the price of food so that the poor man ate his fill, never survived long; it was—to make use of the call sign of those untidy, shambling columns from our streets which seem to monopolize the television news screens—“out!” Lovers of the Old France would say that the country had been without stable government since 1870, but the explanation for the many changes in power in France in those pre‐war days could be expressed in one word—food!

Details

British Food Journal, vol. 74 no. 3
Type: Research Article
ISSN: 0007-070X

Article
Publication date: 1 May 1969

THE funeral oration pronounced by Pericles for the Athenians who perished at the battle of Marathon contained the words: ‘It is not the acknowledgment of poverty that we think…

Abstract

THE funeral oration pronounced by Pericles for the Athenians who perished at the battle of Marathon contained the words: ‘It is not the acknowledgment of poverty that we think disgraceful, but the want of endeavour to avoid it.’ His people, demoralized by plague at home and external troubles abroad, refused to heed his words, just as the world has tended to ignore similar counsel for over 2,000 years.

Details

Work Study, vol. 18 no. 5
Type: Research Article
ISSN: 0043-8022

Article
Publication date: 1 June 1980

The terms are not synonymous; their differences are mainly of function and areas of administration. Community Health is used in national health service law; environmental health…

Abstract

The terms are not synonymous; their differences are mainly of function and areas of administration. Community Health is used in national health service law; environmental health to describe the residuum of health functions remaining with local authorities after the first NHS/Local Government reorganization of 1974. Previously, they were all embraced in the term public health, known for a century or more, with little attention to divisions and in the field of administration, all local authority between county and district councils. In the dichotomy created by the reorganization, the personal health services, including the ambulance service, may have dove‐tailed into the national health service, but for the remaining functions, there was a situation of unreality, which has persisted. It is difficult to know where community health and environmental health begin and end. From the outside, the unreality may be more apparent than real. The Royal Commission on the NHS in their Report of last year state that leaving environmental health services with local authorities “does not seem to have caused any problems”—and this, despite the disparity in status of the area health authority and the bottom tier, local councils.

Details

British Food Journal, vol. 82 no. 6
Type: Research Article
ISSN: 0007-070X

1 – 10 of 63