Ultra-high Speed Melt Spinning-Mechanisms of Structure Development and Fiber Formation of PET

Effect of Melt Spinning Variables on the Structural Changes of Recycled and Bottle Grade Filament Yarn PET

formation and evolution of regional organizations: the case study of the economic cooperation organization (eco)

abstract because of the many geopolitical, geo economical and geo strategically potentials and communicational capabilities of eco region, members can expand the convergence and the integration in base of this organization that have important impact on members development and expanding peace in international and regional level. based on quality analyzing of library findings and experts interv...

Simulation of Multifilament Semicrystalline Polymer Fiber Melt-Spinning

The goal of this effort is to provide an accurate simulation of multifilament fiber melt spinning, applicable for a wide range of material and process conditions. For ease of use, the model should run on a standard laptop or desktop computer in reasonable time (one hour or less). Most melt spinning models simulate the formation of a single filament, with little or no attention given to multifil...

the underlying structure of language proficiency and the proficiency level

هدف از انجام این تخقیق بررسی رابطه احتمالی بین سطح مهارت زبان خارجی (foreign language proficiency) و ساختار مهارت زبان خارجی بود. تعداد 314 زبان آموز مونث و مذکر که عمدتا دانشجویان رشته های زبان انگلیسی در سطوح کارشناسی و کارشناسی ارشد بودند در این تحقیق شرکت کردند. از لحاظ سطح مهارت زبان خارجی شرکت کنندگان بسیار با هم متفاوت بودند، (75 نفر سطح پیشرفته، 113 نفر سطح متوسط، 126 سطح مقدماتی). کلا ...

In-Situ X-Ray Characterization of Fiber Structure During Melt Spinning

The properties of a polymer are strongly influenced by its morphology. In the case of fibers from semicrystalline polymers this consists of the degree of crystallinity, the spacing and alignment of the crystalline regions, and molecular orientation of the polymer chains in the amorphous regions. Information on crystallinity and orientation can be obtained from X-ray analysis. In-situ X-ray char...