Polymer processing/fabrication

Aldissi, M. Inherently Conducting Polymers— Processing, Fabrication, Applications, Limitations Noyes Data Corporation Park Ridge, NJ, 1989. 

Abdou MSA, Orfino FP, Son S, Holdcroft S (1997) Interaction of oxygen with conjugated polymers charge transfer complex formation with poly(3-alkylthiophenes). J Am Chem Soc 119 4518-4524 Aldiss M (1989) Inherently conducting polymers processing, fabrication, applications, hmitations. Noyes Data Corporation, Park Ridge... 

Aldissi, M., "Stability and Stabilization of Pristine and Doped Polymers", Chapter VII (p. 52) in/n/terenr/y Conducting Polymers Processing, Fabrication, Applications, Limitations, Noyes Data Corporation, New Jersey, USA (1989). 

The polymer processing/fabricating industry in Australia is diverse and broadly based, producing products ranging from domestic consumer goods to aircraft and aircraft components such as wing flaps for Boeing. The industry had a turnover of approximately 4.0B in 1987. 

Zvergin VG, Gladchenko AN, Sazonov WV (1984) In Quality and efficiency control and design and fabrication of polymer processing equipment. VNIIRTmaxsh Publication, Tambov, p 32... 

The crystallization kinetics of commercial polyolefins is to a large extent determined by the chain microstructure [58-60]. The kinetics and the regime [60] of the crystallization process determine not only the crystalline content, but also the structure of the interfaces of the polymer crystals (see also Chapter 7). This has a direct bearing on the mechanical properties like the modulus, toughness, and other end use properties of the polymer in fabricated items such as impact resistance and tear resistance. Such structure-property relationships are particularly important for polymers with high commercial importance in terms of the shear tonnage of polymer produced globally, like polyethylene and polyethylene-based copolymers. It is seen that in the case of LLDPE, which is... 

Sensitivity impacts upon the limit of detection and resolution of the device, making it a key performance parameter. Recently, several strategies have been developed in order to provide sensitivity enhancements for optical sensor platforms based on both optical absorption and fluorescence phenomena. These strategies are the result of rigorous theoretical analyses of the relevant systems and, combined with polymer processing technology and planar fabrication protocols, provide a viable route for the development of low-cost, efficient optical sensor platforms. 

An important aspect of this enhancement strategy is its compatibility with current fabrication techniques, in particular polymer processing technology. The technique of micro-injection moulding was employed to produce polystyrene chips with an integrated array of cone structures intended for use in an aqueous environment. 

A), zero-order release cannot be obtained by classical means. However, in this case, the dissolution rate is more sensitive to the quantities of hydrophilic polymer present, fabrication process, nature of the diluent and/or pH variations in the dissolution medium. 

M.L. Shofner, F.J. Rodriguez-Macfas, R. Vaidyanathan, and E.V. Barrera, Single wall nanotube and vapor grown carbon fiber reinforced polymers processed by extrusion freeform fabrication, Composites Part A, 34(12) 1207-1217, December 2003. 

Oxidative degradation of polyethylene (PE) and polypropylene (PP) can occur at all stages of their lifecycle (polymerisation, storage, processing, fabrication and in-service). The auto-oxidation process of polyolefins is best described by the classical free-radical-initiated chain reaction outlined in Scheme 1 [1]. Impurities initially present in the polymers during polymerisation or melt processing, exert profound effects on the behaviour of the final polymer article in service. 

Fig. 1.8 Conceptual structural breakdown of polymer processing product fabrication operations (23).

As discussed in Chapter 1 of this Second Edition, polymer processing is rapidly evolving into a multidisciplinary field. The aim is not only to analyze the complex thermomechanical phenomena taking place in polymer processing equipment, per se, but to quantitatively account for the consequences, on the fabricated polymer products. Thus, the focus of future polymer processing science will shift away from the machine, and more on the product, although the intimate material-machine interactions in the former are needed for the latter. 

Figure 12.9 shows the output and transfer characteristics of a state-of-the-art, polymer FET fabricated using the Plastic Logic direct-write manufacturing process (L = 10 pm). No encapsulation of the TFT is present other than what is naturally provided by the presence of the PET substrate on the bottom and an inkjet printed silver gate electrode on the top. The device exhibits a field-effect mobility of 0.04 cm2 V 1 s 1 and ON-OFF current ratio of 5 x 10s. The threshold potential is Vt = 5-6 V. These basic TFT performance values can be achieved consistently in a manufacturing environment, and are sufficient to drive a 100 dpi electronic paper display with A5 size. 

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