中国塑料 ›› 2025, Vol. 39 ›› Issue (1): 19-24.DOI: 10.19491/j.issn.1001-9278.2025.01.004

• 材料与性能 • 上一篇    下一篇

磷酸酯盐类成核剂对煤基抗冲共聚聚丙烯K8708结晶和力学性能的影响研究

黄起中()   

  1. 国家能源集团国能榆林化工有限公司,陕西 榆林 719000
  • 收稿日期:2024-04-12 出版日期:2025-01-26 发布日期:2025-02-14
  • 作者简介:黄起中(1979-),男,高级工程师,主要从事煤化工生产技术、聚烯烃生产技术及产品开发工作,hqz1685@163.com

Effect of phosphate nucleating agents on crystallization and mechanical properties of coal⁃based impact⁃resistant copolymerization⁃type polypropylene K8708

HUANG Qizhong()   

  1. CHN Energy Shenhua Yulin Energy Chemical Co,Ltd,Yulin 719000,China
  • Received:2024-04-12 Online:2025-01-26 Published:2025-02-14

摘要:

通过两种磷酸酯羟基铝盐成核剂NA⁃21和TD⁃531对煤基抗冲共聚聚丙烯K8708结晶过程的影响研究,实现抗冲共聚聚丙烯的力学性能调控。结果表明,两种成核剂均为聚丙烯(PP)α型成核剂,可显著提高PP的结晶峰温度和结晶成核密度,进而加速其整体结晶速率,实现其刚性和加工效率的双提升。其中成核剂TD⁃531相对于NA⁃21对PP性能提升的作用更为明显,在添加量仅为0.075 %时,不仅可使PP的结晶峰温度和半结晶时间分别提升和降低至131.8 ℃和0.35 min,相对于空白PP分别提高10.0 ℃和降低5.48 min;同时,使得PP的弯曲模量和冲击强度分别提升到1 377 MPa和68.9 kJ/m2,相对于空白PP分别提升330 MPa和22.3 kJ/m2,体现出优良的刚韧平衡作用,此作用与此成核剂优良的分散性能密切相关。

关键词: 磷酸盐成核剂, 煤基聚丙烯, 结晶性能, 力学性能, 刚韧平衡

Abstract:

The effect of two types of phosphate ester hydroxyaluminum salt nucleating agents, NA⁃21 and TD⁃531, on the crystallization process of coal⁃based impact⁃resistant copolymerization⁃type polypropylene (PP) was investigated, realizing the regulation of the mechanical properties of the PP. The results indicated that both of the nucleating agents could act as α⁃Type nucleating agents for the PP to significantly increase its crystallization peak temperature and nucleation density, thus accelerating the overall crystallization rate of the PP and improving its rigidity and processing efficiency. TD⁃531 generated a more significant effect on improving the performance of the PP in contrast to NA⁃21. When the addition amount of TD⁃531 was only 0.075 %, the crystallization peak temperature of the PP increased to 131.8 ℃, its semi⁃crystallization time decreased to 0.35 min. Compared to those of pure PP, the crystallization peak temperature increase by 10 ℃ and the semi⁃crystallization time decreased by 5.48 min. Meanwhile, the flexural modulus and impact strength of the PP increased to 1 377 MPa and 68.9 kJ/m2, respectively, which were increased by 330 MPa and 22.3 kJ/m2, respectively, compared to those of pure PP. This demonstrated a good balance between the rigidity and toughness thanks to a good dispersion effectiveness of the nucleating agent.

Key words: phosphate nucleating agent, coal?based polypropylene, crystallization performance, mechanical property, rigidity and toughness balance

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