Fascination About pvc
Fascination About pvc
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PVC är ett vitt pulver som saknar lukt och smak. Smälts pulvret bildar det en styv färglös polymer med densiteten cirka 1400 kg/m³ och med en mjukningstemperatur vid cirka eighty two°C.
PVC manufacturing entails a procedure referred to as polymerization, whereby monomers of vinyl chloride are chemically bonded to form a polymer chain. The 2 most important sorts of polymerization applied are suspension polymerization and emulsion polymerization.
Vid temperaturer upp until 60°C är styv PVC resistent mot de flesta oorganiska vätskor inklusive moderat koncentrerade syror samt alkali och icke-oxiderande saltlösningar i alla koncentrationer.
In spite of its environmental implications, endeavours are underway to handle PVC squander through productive recycling mechanisms, pushing to a far more sustainable use of this invaluable substance.
The contents on the response vessel are pressurized and frequently mixed to maintain the suspension and make certain a uniform particle dimensions of your PVC resin. The reaction is exothermic and thus involves cooling. As the quantity is reduced through the response (PVC is denser than VCM), water is regularly additional on the combination to take care of the suspension.[nine]
The pvc شبابيك molecular composition of PVC is made of a protracted-chain polymer with repeating vinyl chloride units. Each individual vinyl chloride device is made up of a single carbon atom double-bonded to a chlorine atom and one-bonded to two hydrogen atoms.
聚氯乙烯可由乙烯、氯和催化劑經取代反應製成。由於其防火耐熱作用，聚氯乙烯被廣泛用於各行各業各式各樣產品：
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پروفیلها میتوانند کاملاً از مواد خام ساخته شده باشند یا دارای یک هسته از ضایعات یا مواد بازیافتی باشند که این هسته میتواند توسط پیویسی سخت و بهوسیلهٔ کواکستروژن پوشش داده شده باشد.
Suspension Polymerization: This can be the commonest system used in PVC manufacturing. It involves the initiation of the reaction by totally free radicals, leading to the polymerization of the vinyl chloride monomers suspended in h2o.
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In an average coronary heart rhythm, a small cluster of cells at the sinus node sends out an electrical sign. The signal then travels in the atria towards the atrioventricular (AV) node and into your ventricles, leading to them to deal and pump blood.
モノマーである塩化ビニル（クロロエチレン）を、繰り返し結合したものをポリ塩化ビニルと呼びます。
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