多元复合高流动性聚丙烯的制备与性能

Preparation and Properties of Multiple Compounding High Fluidity Polypropylene

研究了滑石粉(Talc)及偶联剂用量、均聚聚丙烯(PP-H)与马来酸酐接枝物(PP-g-MAH)及PP-H对高流动性共聚聚丙烯(PP)性能的影响;比较了在填充20%Talc的共聚PP中分别添加PP-g-MAH和PP-H的复合体系力学性能及流变性能的变化规律。结果表明:钛酸酯偶联剂用量为1%(相对于Talc)时,所得Talc填充共聚PP综合性能最佳;当Talc用量大于10%时,共聚PP/Talc复合材料的拉伸强度、冲击强度、弯曲强度、熔体流动速率随Talc含量的增加而逐渐下降,弯曲模量则逐渐提高;PP-g-MAH对高流动性共聚PP的拉伸强度增强效果明显优于PP-H,PP-H则使共聚PP的熔体流动性明显下降。

The effects of talc, coupling agent, PP-g-MAH and homo-polymerized PP （PP-H） on properties of high fluidity copolymerized PP were studied. Adding PP-g-MAH and PP-H into copolymerized PP filled with 20% talc respectively, the mechanical properties and fluidity of the composites were compared. The results show that： when titanate coupling agent content is 1% of talc, the general properties of copolymerized PP/talc composite is the best; when the talc content is more than 10%, with the increase of talc content, the tensile strength, impact strength, flexural strength and MFR of copolymerized PP/talc composite decrease, the flexural modulus increases; the tensile strength of copolymerized PP reinforced by PP-g-MAH is much better than that reinforced by PP-H; the addition of PP-H decreases the melt fluidity of copolymerized PP obviously.