本文選題：玻璃纖維氈增強熱塑性塑料　切入點：聚丙烯　出處：《工程塑料應(yīng)用》2017年06期 　論文類型：期刊論文

【摘要】：通過玻璃纖維(GF)氈與雙螺桿擠出相容劑改性聚丙烯(PP)膜的多層疊合,以熔融浸漬法制得PP基GF氈增強熱塑性塑料(GMT)復(fù)合材料,研究了相容劑PP接枝馬來酸酐(PP-g-MAH)和PP接枝丙烯酸(PP-g-AA)的用量(為PP基體質(zhì)量的百分?jǐn)?shù))及其復(fù)配改性,以及相容劑改性PP基體分布和氈體種類對GMT力學(xué)性能的影響。結(jié)果表明,PPg-MAH可明顯提高GMT的拉伸與彎曲性能,但降低了沖擊性能;PP-g-AA可明顯提高GMT的沖擊性能,但不利于拉伸與彎曲性能的提高,只有當(dāng)PP-g-AA用量超過5%后,拉伸性能才有所提升。在PP-g-MAH用量為3%的條件下,將其與不同用量的PP-g-AA進行復(fù)配改性沒有對GMT力學(xué)性能產(chǎn)生協(xié)同作用。在各相容劑用量相近(3%~3.5%)的情況下,與相容劑復(fù)配改性GMT相比,以兩層PP-g-AA改性PP為芯層、PP-g-MAH改性PP為上下表面層作為改性基體分布時,GMT拉伸與彎曲強度分別提高17%和27%、缺口沖擊強度提高48%;而以兩層PP-g-MAH改性PP為芯層、PP-g-AA改性PP為上下表面層作為改性基體分布時,在不損失強度與剛性的同時,缺口沖擊強度提高了88%。采用連續(xù)GF氈的GMT力學(xué)性能比采用短切GF氈的GMT高,尤其是缺口沖擊強度提高了89.6%。
[Abstract]:The PP matrix GF felt reinforced thermoplastic plastic (GMTT) composite was prepared by melt impregnation of glass fiber glass fiber (GFG) felt and PP / PP film modified by twin-screw extrusion compatibilizer. The content of compatibilizer PP grafted maleic anhydride (PP-g-MAH) and PP grafted acrylic acid (PP-g-AA) (percentage of mass of PP matrix) and its compound modification were studied. The effects of matrix distribution and the type of felt modified by compatibilizer on the mechanical properties of GMT were studied. The results showed that PPg-MAH could obviously improve the tensile and flexural properties of GMT, but decrease the impact property of GMT. PP-g-AA could obviously improve the impact property of GMT. But it is not good for the improvement of tensile and flexural properties. Only when the amount of PP-g-AA exceeds 5% can the tensile properties be improved. When the amount of PP-g-MAH is 3%, It has no synergistic effect on the mechanical properties of GMT when modified with different amount of PP-g-AA. Under the condition that the amount of compatibilizer is similar to that of 3. 5%), it is compared with the blend of compatibilizer to modify GMT. The tensile strength and flexural strength of two-layer PP-g-AA modified PP were increased by 17% and 27, respectively, and the notched impact strength was increased by 48 with PP-g-MAH modified PP as the upper and lower surface layers, while the PP modified by two-layer PP-g-MAH was used as core layer and PP-g-AA modified PP as the top one. When the lower surface layer is distributed as the modified matrix, The mechanical properties of GMT with continuous GF felt were higher than that of GMT with short cut GF felt, especially the notched impact strength increased 89.6%.
【作者單位】： 華東理工大學(xué)化學(xué)工程聯(lián)合國家重點實驗室;
【基金】：國家自然科學(xué)基金項目(21376086)
【分類號】：TB332;TQ327.1

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