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余柏宏, 2015資工一甲10211115余柏宏指導老師:林家慶 老師黏的性質11 1.膠水有何作用力 膠水的成分是聚乙烯醇和硼砂。聚乙烯醇是一種水溶性塑膠,當把聚乙烯醇加入水時,聚乙烯醇會溶解在水,再把硼砂加入時,硼原子與氧原子會將聚乙烯醇分子串在一起,所形成的黏稠狀液體就是膠水。22 2.為何
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