The effect of a new liquid crystalline copolymer(LCP-H2) on the crystallization structure of isotactic polypropylene(iPP) was investigated using wide-angle X-ray diffraction.The experimental results show that LCP-H2 of low mass fraction can induce β-form in iPP.The nucleating activity of LCP-H2 mainly depended on its content and crystallization temperature.The content of β-form(Kβ) increased with increasing the nucleator content and crystallization temperature,Kβ value reached a maximum value(35%) when the nucleator mass fraction was 0.8% and the crystallization temperature was 125 ℃.
