high molecular mass

It is proved that LMPVC has lower plastication temperature, higher melt fluidity and better compatibility with high molecular mass PVC.

实验表明，这种LMPVC具有较低的塑化温度和较高的熔体流动性，且与高相对分子质量的PV C树脂有良好的相容性。

The polyether polyols prepared by these DMC catalysts are of low unsaturation, high relative molecular mass, narrow molecular distribution compared with traditional KOH catalysts.

实验发现，用DMC催化剂合成的聚醚与用KOH催化剂合成的聚醚相比不饱和度低，相对分子质量高，相对分子质量分布窄。

Because of the connection between outflow and accretion seen in low-mass stars, surveys of molecular outflows in high-mass YSOs can shed light on this debate.

因为在低质量恒星形成中外流与吸积相联系，在大质量恒星形成区搜寻分子外流将有助于解决这种争论。