电子束辐射对玻纤/尼龙6复合材料性能的影响

利用电子束对30wt%玻璃纤维(GF)/尼龙6(PA6)复合材料进行辐射交联改性,研究了敏化剂的用量、辐射剂量等对GF/PA6复合材料的结构、力学性能、吸水性能以及热稳定性的影响,并通过SEM对复合材料的交联结构及燃烧后形成的炭层进行了观察。结果表明:当三烯丙基异氰脲酸酯(TAIC)含量为1wt%、辐照剂量为50kGy时,GF/PA6的拉伸强度、弯曲强度、常温及低温冲击强度分别提高了15.7%、43.2%、18.7%和17.3%;随着辐照剂量的增加,GF/PA6复合材料的交联密度不断增大;GF/PA6复合材料燃烧后会形成致密炭层,可以有效地减缓乃至消除尼龙6燃烧时形成的熔滴。

Electric beam irradiation effect on properties of glass fibers/nylon 6 composites

The radiation crosslinking modification of 30wt% glass fibers (GF)reinforced nylon 6 (PA6)compos-ites was conducted using electron beam at different radiation doses.The triallyl isocyanurate (TAIC)was used as the sensitizer.The effects of radiation doses and sensitizer loadings on the structure,mechanical properties,water absorption and thermal stability of GF/PA6 composites were investigated.The experiment results show that the tensile strength,flexural strength,and impact strength of GF/PA6 composites are enhanced by 15.7%,43.2%, 18.7% and 17.3%,respectively,at a TAIC content of 1wt% and a radiation dose of 50 kGy.Moreover,both the crosslinking structure of the GF/PA6 composites composites and the carbonized structure after the pyrolysis are ob-served by SEM.The crosslinking density of GF/PA6 is found to increase with increasing the radiation dose.During the pyrolysis process,the formed dense carbonized structure is effective in slowing down,even eliminating the for-mation rate of molten drops of GF/PA6 composites.