ポリビニルアルコール（PVA）は、化学式
(C₂H₄O)n を持つ高分子化合物で、一般的には水溶性の合成樹脂として知られています。この化合物は、エチレンと酢酸ビニルを反応させて得られるビニルアルコールの重合によって作られます。ポリビニルアルコールは、特に水に溶けやすく、様々な産業分野で広く利用されており、その特性から特に工業用材料として重要です。ポリビニルアルコール. PVAは、酢酸ビニルを重合させて得られるポリ酢酸ビニル（PVAの前駆体）をアルカリで加水分解することによって製造されます。この加水分解によって、PVAの分子中のエステル結合が水酸基に変換され、最終的にポリビニルアルコールが得られます。加水分解の程度によって、ポリビニルアルコールの特性が異なり、分子量や水溶性が変化します。 ポリビニルアルコールは、その多くの特性を活かして、さまざまな分野で広く利用されています。以下は、主な用途です。ポリビニルアルコールは水溶性であるため、環境への負荷が比較的低いとされています。水に溶解した後は、比較的速やかに分解されることが多く、土壌や水域に長期間残ることは少ないです。ただし、大量に使用された場合や不適切に処理された場合には、環境に悪影響を与える可能性もあります。

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