If two fibers are alike except for polymer length, the fiber with the longer polymers generally is stronger, extends a shorter distance at a given load, and requires more force to cause elongation.

• 如果两中纤维除了分子长度之外都一样，则有着较长长度分子的纤维一般来说更强，给力使拉伸出的距离短，需要更大的力来拉长。