Not known Facts About pvc
Not known Facts About pvc
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押出成形は、押出機のなかに溶融した原料を入れ、口金から押し出して成形する加工方法です。
Health care: The healthcare market utilizes PVC in many different clinical devices which include blood luggage, tubing, and IV baggage. Its capability to be sterilized causes it to be ideal for these purposes.
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 often Employed in design as insulation on electrical wires or in flooring for homes, hospitals, faculties, together with other spots exactly where a sterile surroundings is important. Rigid PVC is usually Employed in construction as pipe for plumbing and siding that is commonly named
Suspension Polymerization: This is certainly the most typical strategy Employed in PVC output. It consists of the initiation with the response by free of charge radicals, leading to the polymerization from the vinyl chloride monomers suspended in water.
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Poly(vinyl chloride) (PVC) continues to be an interesting subject for polymer science investigation. Its qualities are heightened by its inherent structural faults ensuing from direct production (by free-radical polymerization), which also lead to its thermal instability. Many of the elemental limiting capabilities of PVC happen to be instructed to be alleviated by improved chemistry all through PVC synthesis, In combination with the use of both equally inorganic and organic thermal stabilizers. The qualities, characterization, modification, recycling, and many programs of PVC are all examined During this paper combined with the previous and newest analysis discoveries. It's been advised that many of the fundamental restricting Attributes of PVC may be lessened by making use of both inorganic and organic and natural thermal stabilizers in conjunction with improved chemistry through PVC manufacture.
Up coming, the signals arrive at a cluster of cells known as the atrioventricular (AV) node, wherever they decelerate. This slight hold off permits the ventricles to fill with blood. If the electrical indicators get to the ventricles, the chambers deal and pump blood into the lungs or to the rest of the body.
Identified while in the nineteenth century, this resilient substance has found applications inside a broad spectrum of industries as a result of its versatility, chemical balance, and economic efficiency.