This could be attributed to the stiffer nature of the acrylic fibres compared to the PP fibres as the elastic modulus of the former was reported to be in the

range of 14.6–19.6 GPa as compared to the range of 3.5–4.9 Gpa for the latter

as compared to 中的as为连词用法引导比较状语。意思与..相比较

The monarchy is much weaker now as compared to the past.  

现在皇室的力量比以前弱多了.

The Lagrange method is simpler as compared to the Newton's method.  

与牛顿方法相比,拉格朗日方法要简便得多.