Shanghai Daoqin Plastics Co., Ltd.

         for nylon 6 进行 toughened can improvement its low temperature lower impact strong/high degree, expand 展PA6 材 material application areas.

        以PA6, polyolefin toughening agent, antioxidant is raw materials, research one-time extrusion and 二次 extrusion made toughened PA6 材 material tensile strength, tensile strong/high degree, fracture elongation, tensile fracture strong/high degree, room temperature and –40℃ impact strong/high degree  .

        1　 tensile strength

         tensile strength in material tensile in 位置如图1 in 1 点 示. from table/sheet 1 can to, one-time extrusion process to toughened PA6 材 material tensile strength is 48.18 MPa, is 经 二次 extrusion process rear, toughened PA6 材 material tensile strength decline is 41.47 MPa.

         in extrusion process in although add and one-time process and other amount antioxidant, is toughened PA6 材 material still 然发生 obvious oxidation phenomenon, one-time and extrusion process to toughened PA6 材 material appearance 如图2 示. from 图2 can to, extrusion process to toughened PA6 pellets color obvious ratio one-time extrusion process pellets color deep, 说明二次 extrusion process toughened PA6 材 material more more oxidation degradation, therefore extrusion process in to toughened PA6材 material tensile strength more low.

        2  tensile strong/high degree

         tensile strong/high degree in toughened PA6 材 material tensile in 位置如图1 in 2 点 示. from table/sheet 1 can 看出, one-time extrusion process to toughened PA6 材 material tensile strong/high degree is 42.25 MPa, 经 二次 extrusion process rear, toughened PA6 材 material tensile strong/high degree has decline, is 41.47 MPa. although toughened PA6 材 material in extrusion process in more more oxidation degradation, is for toughened PA6 材 material tensile strong/high degree effect/influence large, toughened PA6 材 material tensile strong/high degree for extrusion process and oxidation degradation defect 不敏感.

        3　 fracture elongation

         from table/sheet 1 can to, one-time extrusion process to toughened PA6 材 material fracture elongation is 198.67%, is 经 二次 extrusion process rear, toughened PA6 材 material fracture elongation significantly decline to 152.73%, decline degree to 23%. this is due to extrusion process to toughened PA6 材 material more more oxidation degradation, formed PA6 链段 defect increase, make toughened PA6 材 material fracture elongation significantly decline, toughened PA6 材 material fracture elongation for extrusion process and oxidation degradation defect non 常敏感.

        4　 tensile fracture strong/high degree

         fracture strong/high degree in toughened PA6 材 material tensile in 位置如图1 in 3 点 示. from table/sheet 1 can to, one-time extrusion process to toughened PA6 材 material fracture strong/high degree is 48.18 MPa, 经 二次 extrusion process rear, toughened PA6 材 material fracture strong/high degree decline to 40.78 MPa, this and 2 extrusion process for toughened PA6 材 material tensile strength effect/influence separation versus 似, this property can for extrusion process and oxidation degradation defect non 常敏感.

        5　 room temperature impact strong/high degree

         from table/sheet 1 can to, one-time extrusion process to toughened PA6 材 material room temperature impact strong/high degree is 99.53 kJ/m2, 经 二次 extrusion process rear, toughened PA6 材 material room temperature impact strong/high degree decline to 89.03 kJ/m2, decline degree to 10%. this toughened PA6材 material room temperature impact strong/high degree for extrusion process and oxidation degradation defect non 常敏感, good antioxidant system is toughened PA6 材 material tough property good 保障.

        6　–40℃ impact strong/high degree

         is meet/satisfy toughened PA6 材 material in low temperature lower can maintain good impact resistant property can, need in low temperature lower (generally is –40℃) toughened PA6 材 material impact strong/high degree.

         from table/sheet 1 can to, extrusion process for toughened PA6 材 material –40℃ impact strong/high degree effect/influence significantly. this toughened PA6 材 material –40℃ impact strong/high degree for extrusion process and oxidation degradation defect 不敏感, this and room temperature impact strong/high degree effect/influence different, is temperature degree decline, toughened PA6 材 material impact strong/high degree decline non obvious.