The effect of temperature changes on to quasi-static tensile and flexural performance of glass fibre reinforced PA66 composites

A significant method of reducing CO2 emissions in road vehicles is to reduce the vehicle mass. One means in which this can be achieved is to adopt lightweight materials such as thermoplastic composites. Thermoplastics offer advantages in term of weight when compared to conventional steel and aluminium casting. In this study thermal mechanical testing has been conducted on two types of commercial polyamide 66 (PA66) with 35 wt.% short glass fibre reinforcement. One of the materials was impact modified with an elastomer to increase material toughness. Experimental results showed both the reinforced PA66 materials to be temperature dependent. All test results demonstrated the trade-off in the mechanical properties of the two materials especially the impact modified. PA66 with 35 wt.% short glass fibre exhibits the best tensile strength, flexural strength and modulus for each temperature tested. Whereas the impact modified PA66 with 35 wt.% short glass fibre exhibits the higher strain and toughness for each temperature tested

The Barometer

In further consideration of the tenet set forth in the New Horizons article in the November 1969 issue of Naval War College Review, three problems antithetical to A Concept for Carrier Air Capability in the Standing Naval Force Atlantic (SNFL) are brought to mind

Set & Drift: A Contemporary Political Dilemma: The Impact of Intelligence Operations on Foreign Policy

In the affairs of politically organized mankind, there is a ladder of actions which commences with variegated, often amorphous qualities that have come to be called national interests

The Soviet Union and the Southern Sea Route

At least since 1946, there has been a strong, persistent impression in the United States that the keys to under­standing Soviet interests in Southwest Asia are linked to oil and the ability to regulate or deny that oil to other nations. 1 The Russians also are widely held to be intent on acquiring a warm water port, that is, a year-around port, on the Indian Ocean,

Future intercontinental and Theater Missile Systems

Two perspectives in the continuing development of theater and intercontinental weapon systems in the United States and the Soviet Union may soon converge. One is represented by the ascendancy and dominance of highly accurate, sea-launched, ballistic missiles (SLBM); the other by the ascendancy and dominance of a mixture of long-range cruise missiles (CM), medium-range ballistic missiles (MRBM), and small intercontinental ballistic missiles (SICBM)

Soviet Reaction to the U.S. Maritme Strategy

The question of the Soviet Union\u27s reaction to the U.S. Maritime Strategy is an intriguing one. Divining how the Soviets view that strategy and how they prepare themselves to respond to it, both in peace and in war, should be an important component of the Maritime Strategy itself. If for no other reason, this question is important because of the oft­voiced proposition that, given nominal equivalency in military firepower, the superior strategy usually wins superiority in war has its roots in the quality and scope of military thought

The Soviet Union and the Southern Sea Route

At least since 1946, there has been a strong, persistent impression in the United States that the keys to under­standing Soviet interests in Southwest Asia are linked to oil and the ability to regulate or deny that oil to other nations. 1 The Russians also are widely held to be intent on acquiring a warm water port, that is, a year-around port, on the Indian Ocean,

Synthesis of Hybrid Cyclopeptides through Enzymatic Macrocyclization

Acknowledgements We thank Dr. G. Mann and Dr. A. Bent for supplying the enzymes and the useful discussions, and Dr. T. Lebl for the useful NMR discussions. This work was supported by the European Research Council (339367), UK Biotechnology and Biological Sciences Research Council (K015508/1), the Wellcome Trust [TripleTOF 5600 mass spectrometer (094476), the MALDI TOF-TOF Analyzer (079272AIA), 700 NMR], and the EPSRC UK National Mass Spectrometry Facility at Swansea University. J.H.N., M.A.J., and N.J.W. are named on patents that have been filed by St. Andrews and Aberdeen Universities to commercialize the enzymes (PatG) and (LynD) used in the study. No income derives from the patent.Peer reviewedPublisher PD