A New Technique for Fabrication of Flat PP/Talc Graded Material

2005 ◽  
Vol 475-479 ◽  
pp. 1525-1528 ◽  
Author(s):  
Bian-Ying Wen ◽  
Gang Wu ◽  
Jian Yu
Keyword(s):  
Weight Ratio ◽  
Processing Method ◽  
New Technique ◽  
Talcum Powder ◽  
Structure And Property ◽  
Graded Material ◽  
Feeding Speed ◽  
Novel Processing ◽  
A New Technique ◽  
Gradient Variation

This work deals with a novel processing method that combined extrude with laminate molding for preparing polymeric graded material (PGM). The variations of inhomogeneous property were generated by altering the feeding speed and/or weight ratio of the components as well as changing the order or numbers of the folded layers. Three modes of polypropylene (PP)/ talcum powder (talc) flat PGM (signed with T1, T2, T3) are fabricated successfully by using this new technique. The preparation, structure and property of the resultant PP/talc graded composite were investigated. Results indicate that the composition, morphology and properties show a gradient variation along their thickness direction of the flat PGMs.

Quickstep Processing of Polymeric Composites

2017 ◽  
pp. 894-919
Author(s):  
Laraib Alam Khan
Keyword(s):  
Basic Principle ◽  
Polymeric Composites ◽  
Processing Method ◽  
Literature Survey ◽  
New Technique ◽  
New Materials ◽  
Aerospace Materials ◽  
Materials Development ◽  
A New Technique ◽  
Out Of Autoclave

This chapter gives an overview of Quickstep processing method, which is relatively a new technique for manufacturing composites. In this chapter, different aspects of Quickstep processing are highlighted. Since Quickstep processing is an Out-Of-Autoclave (OOA) technique, a brief description of autoclave processing is provided. Basic principle of Quickstep processing and functionality of typical Quickstep plant are also explained. Due to changed chemo-rheology, methodology for cure optimization of different prepregs and composites are discussed with examples. This chapter also includes the literature survey of different aerospace materials being investigated in Quickstep, the potential of new materials development for this process, the melding technique, in service capabilities of Quickstep cured samples and journey of Quickstep from patent to commercialization. Although the technique is commercialized now, few suggestions in the end are provided for the improvement of process.

Quickstep Processing of Polymeric Composites

2015 ◽  
pp. 373-398
Author(s):  
Laraib Alam Khan
Keyword(s):  
Basic Principle ◽  
Polymeric Composites ◽  
Processing Method ◽  
Literature Survey ◽  
New Technique ◽  
New Materials ◽  
Aerospace Materials ◽  
Materials Development ◽  
A New Technique ◽  
Out Of Autoclave

This chapter gives an overview of Quickstep processing method, which is relatively a new technique for manufacturing composites. In this chapter, different aspects of Quickstep processing are highlighted. Since Quickstep processing is an Out-Of-Autoclave (OOA) technique, a brief description of autoclave processing is provided. Basic principle of Quickstep processing and functionality of typical Quickstep plant are also explained. Due to changed chemo-rheology, methodology for cure optimization of different prepregs and composites are discussed with examples. This chapter also includes the literature survey of different aerospace materials being investigated in Quickstep, the potential of new materials development for this process, the melding technique, in service capabilities of Quickstep cured samples and journey of Quickstep from patent to commercialization. Although the technique is commercialized now, few suggestions in the end are provided for the improvement of process.

A new technique for producing pure aortic stenosis in animals

1984 ◽  
Vol 246 (2) ◽  
pp. H296-H301 ◽  
Author(s):  
Q. Su-Fan ◽  
J. M. Brum ◽  
M. P. Kaye ◽  
A. A. Bove
Keyword(s):  
Aortic Stenosis ◽  
Weight Ratio ◽  
Left Ventricular ◽  
New Technique ◽  
End Diastolic Volume ◽  
Valvular Stenosis ◽  
Valvular Aortic Stenosis ◽  
A New Technique ◽  
The Right ◽  
Short Time

To date, techniques used to produce an animal model of valvular aortic stenosis have been unsuccessful. We have developed a new technique for producing pure subcoronary aortic valvular stenosis, which results in left ventricular hypertrophy in a short time. Five adult mongrel dogs weighing 18-24 kg were anesthetized with Brevital (0.5 mg/kg), intubated, and mechanically ventilated with halothane-oxygen. The chest was opened through the right 4th intercostal space, and cardiopulmonary bypass was established between the right atrium and femoral artery. When the esophageal temperature was reduced to about 25 degrees C, the aorta was cross clamped and incised. A piece of Teflon felt covered by pericardium was sutured into each of the sinuses of Valsalva below the coronary orifices. Two to four weeks after the operation, the animals were catheterized. The average pressure gradient between left ventricle (LV) and aorta was 52 +/- 15 mmHg. Mean LV mass-to-body weight ratio was 6.16 +/- 0.28 g/kg vs. 4.24 +/- 0.27 for controls. End-diastolic volume and ejection fraction remained normal, and no aortic regurgitation was seen on aortic root angiography. This preparation creates a hemodynamic representation of valvular aortic stenosis and produces a useful model for examining the myocardial response to this disease. Although hypertrophy develops rapidly, slowly developing hypertrophy may also be possible with this technique.

A new technique for the mapping of oxygen tension on the brain surface

2005 ◽  
Vol 25 (1_suppl) ◽  
pp. S543-S543
Author(s):  
Satoshi Kimura ◽  
Keigo Matsumoto ◽  
Yoshio Imahori ◽  
Katsuyoshi Mineura ◽  
Toshiyuki Itoh
Keyword(s):  
Oxygen Tension ◽  
New Technique ◽  
Brain Surface ◽  
A New Technique ◽  
The Brain
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