Why do carbonated drinks bubble more in plastic cups?
[ 2006-04-18 08:27 ]
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The properties and characteristics of a particular member
of the plastics family, PET (polyethylene
terephthalate), causes carbonated drinks to bubble more in
plastic cups.
PET, a clear, strong polymer, has unsurpassed
gas and moisture barrier properties. Its ability to
contain carbon dioxide makes it the plastic, and the material
of choice for carbonated beverage containers.
PET containers have no competition in retaining carbon
dioxide, the gas responsible for the effervescent,
bubbling effect. The property that gives rise to a vast number
of bubbles is the unique barrier layers, which prevent the
loss of carbonation. The barrier layers serve to keep the
container airtight, which keeps the carbon dioxide from
leaking out, and oxygen from entering. This is why containers
made from PET plastic keep carbonated beverages colder, more
flavorful, and fizzier.
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polyethylene: 聚乙烯
terephthalate:對苯二酸鹽(或酯)
polymer: 聚合體
unsurpassed: 非常卓越的
effervescent: 冒泡
fizzy:
泡沫沸騰
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