时差N小时:你知道保鲜膜的原理吗?(上)
日期:2017-09-14 18:28

(单词翻译:单击)

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What makes kitchen plastic wrap cling so maddeningly to itself, and so conveniently to the sides of bowls and plates?
为何厨房的保鲜膜可以自我吸附,还能巧妙地贴合在碗盘上?
Plastic wrap clings for two reasons: it’s elastic and it’s sticky.
保鲜膜粘附主要有两个原因:弹性和粘性+AvJ=[Kb!Wmz@IL
That probably seems pretty obvious, but let’s explore the chemistry beneath the elasticity and stickiness of plastic wrap.
虽然看起来很明显,不过我们还是来探究一下保鲜膜弹性和粘性下的化学原理吧FhtaUHJ+~5B]P@o6yb.

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Plastic wrap is elastic because of its molecular structure.
保鲜膜因其本身的分子结构而具有弹性00f&V6LcT3KD&|ks#Z#
A molecule of plastic is incredibly long and coiled up like a spring.
塑料的一个分子很长并且可以像弹簧一样蜷曲wMn^Hq_IiGWu&&)U2wv
When you stretch out a piece of plastic wrap, you uncoil these long molecules.
当你将一块保鲜膜伸扯开时,同时也拉长了它的分子w%INEyXC8Sd,i&3XisID
Like a spring, the stretched molecules tend to spring back, perhaps tucking under the rim of the bowl you just covered!
保鲜膜被拉伸后会像弹簧般收缩,也许就刚好贴合在碗的边缘SEIf6&qkA!
Over time, certain types of plastic wrap lose some of their elasticity, which could explain why that dish you wrapped tightly may loosen up after a day or two.
随着时间推移,有些品种的保鲜膜会逐渐失去弹性]c=95ihHZ3KT8JX&mv(c。这也就解释了为何紧贴在碗边的保鲜膜会在一两天后松开Wg1yrV6J;TEt*

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译文为可可英语翻译,未经授权请勿转载!

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