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研究了添加α成核剂聚丙烯(α-PP)、β成核剂聚丙烯(β-PP)和纯聚丙烯3种材料在紫外辐射下的聚集态结构变化、力学性能和表观变化的情况。结果表明:与其他两种聚丙烯相比,β-PP具有较高的抗降解能力;3种聚丙烯在紫外光辐射初期结晶度都有所提高,但随着辐射时间的增加,总结晶度都呈下降趋势;β-PP中的β相的结晶度先增后减,而α相的结晶度先减后增,312 h后基本保持不变。
The aggregation structure, mechanical properties and apparent changes of the three kinds of materials with α nucleating agent (α-PP), β-nucleating agent (β-PP) and pure polypropylene Happening. The results showed that β-PP had higher anti-degradation ability than the other two polypropylenes. The crystallinity of the three kinds of polypropylene increased at the initial stage of UV radiation. However, with the increase of irradiation time, the total crystallinity The crystallinity of β-phase in β-PP first increased and then decreased, while the crystallinity of α phase decreased first and then increased, and remained unchanged after 312 h.