异氰酸基改性剂的制备及在木塑材料中的应用

发布时间：2018-04-24 00:20

  本文选题：改性剂 + 异氰酸酯　； 参考：《塑料工业》2016年01期

【摘要】：以4,4'-二环己基甲烷二异氰酸酯(HMDI)与十八醇为原料,制备了含异氰酸基的改性剂,并研究其对高密度聚乙烯(HDPE)/木粉复合材料和聚丙烯(PP)/木粉复合材料力学性能及加工性能的影响。结果表明,通过5%改性剂改性以后的木粉,其表面接触角能够达到144.3°。由改性木粉制备的HDPE/木粉复合材料,拉伸强度较未改性最多提高33.9%,断裂伸长率提高74.1%;当改性剂质量分数为3%时,塑化时间从169 s缩短至146 s,平衡扭矩从9.8 N·m减小到8.9 N·m,塑化温度从135.6℃降低至131.9℃。由改性木粉制备的PP/木粉复合材料,拉伸强度较未改性最多提高24.3%,断裂伸长率提高41.8%;当改性剂质量分数为3%时,塑化时间从144 s缩短至102s,平衡扭矩从10.7 N·m减小到7.3 N·m,塑化温度从174.7℃降低至162.7℃
[Abstract]:The modifier containing isocyanate group was prepared by using HMDI and octadecanol as raw materials. The effects of HMDI on the mechanical properties and processing properties of HDPE / wood flour composites and PP / wood powder composites were studied. The results showed that the surface contact angle of wood flour modified by 5% modifier could reach 144.3 掳. The tensile strength and elongation at break of HDPE/ wood flour composites prepared from modified wood flour were increased by 33.9% and 74.1%, respectively, and when the mass fraction of modifier was 3%, the tensile strength of the composites was increased by 33.9%, and the elongation at break increased by 74.1%. The plasticizing time was shortened from 169s to 146s, the balance torque decreased from 9.8N m to 8.9 nm, and the plasticizing temperature decreased from 135.6 鈩，

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