今回の記事では塩ビについての特徴・加工方法・用途などについて解説します。
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The polymers are linear and therefore are sturdy. The monomers are predominantly arranged head-to-tail, that means that chloride is situated on alternating carbon centres. PVC has mainly an atactic stereochemistry, which suggests which the relative stereochemistry of the chloride centres are random. Some degree of syndiotacticity on the chain presents a few % crystallinity that is definitely influential on the Qualities of the fabric.
About fifty percent of the planet's PVC creation ability is in China, despite the closure of many Chinese PVC plants as a result of troubles complying with environmental restrictions and poor capacities of scale.
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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：
Untimely ventricular contractions usually induce handful of or no symptoms. But the additional beats could potentially cause abnormal sensations during the chest, for instance:
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Co-stabilisatorer Synergistiska med andra stabilisatorer och kan vara polyoler, organiska fosfiter, epoxiestrar eller epoxiderade oljor
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Upcoming, the alerts arrive at a cluster of cells called the atrioventricular (AV) node, in which they decelerate. This slight hold off makes it possible for the ventricles to fill with blood. If the electrical alerts get to the ventricles, the chambers deal and pump blood to the lungs or to the rest of the entire body.
Even though PVC has numerous beneficial utilizes, Additionally, it has a significant environmental impact. The output and disposal of PVC may result in the discharge of damaging chemical substances into the ecosystem. On top of that, resulting from its sturdiness, PVC waste can persist in the ecosystem for extended durations.