Cohesion means the strength of intermolecular forces that hold the material together.

内聚指把物质结合在一起分强度。

They are used to help it grip to surfaces using intermolecular forces.

它们帮助壁虎抓住物体表面采分。

The answer lies in a clever combination of intermolecular forces and stuctural engineering.

答案是分之与结构工程巧妙结合。

But polymers within the SPN are crosslinked by more transient intermolecular forces, such as hydrogen bonding.

但SPN内部聚合物则更多是由瞬态分交联，例如氢键。

The other main type of intermolecular forces are " dipole-dipole forces."

另一种主要类型分是“偶极-偶极” 。

The only intermolecular force that's holding two methane molecules together would be London dispersion forces.

唯一将两个甲烷分结合在一起分是伦敦色散。

It's very weak, which is why London dispersion forces are the weakest intermolecular forces.

它非常弱，这就是为什么伦敦色散是最弱分。

We're talking about an intermolecular force.

我们谈论是分。

But it is the strongest intermolecular force.

但它是最强分。

Here's your hydrogen showing intermolecular force here.

这是你氢在这里显示分。

It's happening because of what we call " intermolecular forces."

它发生是因为我们称之为“分” 。

There are basically 2 main types of intermolecular forces.

基本上有两种主要类型分。

But, do not get me wrong, here. I'm not saying that intermolecular forces aren't important.

但是，不要误会我意思，在这里。我并不是说分不重要。

Let's look at another intermolecular force.

让我们看看另一种分。

And an intermolecular force would be the force that are between molecules.

分就是分之。

So these are the weakest intermolecular forces, and they have to do with the electrons that are always moving around in orbitals.

所以这些是最弱分，它们与总是在轨道上移动电有关。

And so let's look at the first intermolecular force.

那么让我们看看第一个分。

The strength of that surface tension depends on the intermolecular forces that pull molecules of a liquid together.

表面张强度取决于将液体分拉到一起分。

And the intermolecular force, in turn, depends on the electronegativity.

而分又取决于电负性。

And it has to do with the intermolecular force of dipole-dipole interactions holding those molecules together.

它与将这些分结合在一起偶极-偶极相互分有关。