The Basic Principles Of pvc
The Basic Principles Of pvc
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何本もある加熱したロールに、原料を通して圧延したあと、冷却ロールに通して厚みを調整し、材料を巻き取ることで、シートやフィルム状の塩ビを成形します。
PVC output will involve a system often known as polymerization, whereby monomers of vinyl chloride are chemically bonded to sort a polymer chain. The 2 principal sorts of polymerization employed are suspension polymerization and emulsion polymerization.
And also its structural integrity, Furthermore, it Rewards from owning better color-fastness compared to choice PVC foam merchandise accessible on the market.
این صفحه آخرین‌بار در ۲۳ ژانویهٔ ۲۰۲۵ ساعت ۱۵:۳۹ ویرایش شده است.
موارد استفادهٔ فراوانی برای پی‌وی‌سی شامل: وینیل سایدینگ، علامت مغناطیسی کارت‌ها، برش عمودی پنجره‌ها، صفحات گرامافون، لوله، لوله‌کشی، کانال و لوازم نصب‌کردنی، کیف‌های ارزان‌قیمت، پنجره‌های تاریک (بدون دید) و در شکل نرم آن برای لباس، اثاثیه یا لوازم داخلی نظیر پرده، کف‌سازی و ساختن سقف، پوستهٔ کابل‌های الکتریکی، توپ‌های بازی سبک‌وزن وجود دارد.
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پلی‌وینیل کلراید به‌وسیلهٔ پلیمریزاسیون مونومر وینیل کلراید شکل می‌گیرد. تولید تجارتی قسمت اعظم پی‌وی‌سی عمدتاً از طریق بسپارش تعلیقی انجام می‌شود و از بسپارش‌های توده‌ای و امولسیونی به میزان کمتر و از بسپارش محلولی به ندرت استفاده می‌شود. پلی‌وینیل کلراید از بلورینگی ناچیزی برخوردار بوده اما به علت زنجیرهای حجیم بسپار (نتیجهٔ استخلاف بزرگ کلر) از استحکام و سختی برخوردار است. تی جی برای آن بالا و به میزان ۸۱ درجهٔ سانتی‌گراد است ولی میزان این تی جی آن‌قدر بالا نیست که فرایند با روش‌های گوناگون را دچار مشکل کند.
Flexible PVC is commonly Utilized in building as insulation on electrical wires or in flooring for properties, hospitals, universities, and other locations in which a sterile setting is essential. Rigid PVC is usually used in construction as pipe for plumbing and siding that is commonly referred to as
Suspension Polymerization: This is often the commonest system Employed in PVC generation. It involves the initiation of your response by cost-free radicals, resulting in the polymerization of the vinyl chloride monomers suspended in h2o.
Sure. An شيش حصير expanded PVC sheet has been intended with interior and exterior takes advantage of in your mind. You'll be able to therefore utilize it with self-confidence on exterior features of the boat that may be subjected to rain, snow, sleet, and other adverse climatic conditions. Can expanded marine PVC board be bent to condition?(present/hide)
Poly(vinyl chloride) (PVC) has become a fascinating subject for polymer science investigate. Its qualities are heightened by its inherent structural faults ensuing from direct production (by free-radical polymerization), which also lead to its thermal instability. A number of the basic restricting functions of PVC are actually recommended to get alleviated by improved chemistry in the course of PVC synthesis, in addition to the usage of both equally inorganic and natural thermal stabilizers. The features, characterization, modification, recycling, and numerous apps of PVC are all examined in this paper combined with the earlier and most recent investigation discoveries. It has been proposed that many of the fundamental restricting properties of PVC might be lessened by implementing each inorganic and organic and natural thermal stabilizers at the side of improved chemistry during PVC manufacture.
Upcoming, the alerts get there in a cluster of cells called the atrioventricular (AV) node, exactly where they slow down. This slight delay makes it possible for the ventricles to fill with blood. If the electrical alerts get to the ventricles, the chambers agreement and pump blood for the lungs or to the rest of the human body.
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