CAJ | 학술논문

采用化学扩链的方法，将环氧类扩链剂与尼龙(PA)6通过双螺杆挤出机进行熔融反应，制备高黏度PA6，并对扩链后的PA6特性黏度、力学性能和流变行为进行了研究。结果表明，扩链剂的加入提高了PA6的特性黏度、力学性能和平衡扭矩，同时降低了熔体流动速率(MFR)。但扩链剂用量存在一个最佳值，当扩链剂质量分数为0.9%时，扩链后的PA6特性黏度、缺口冲击强度、拉伸强度、断裂伸长率、弯曲强度、弯曲弹性模量和平衡扭矩均达到最大，相对于纯PA6分别提高了86.25%，30.59%，21.44%，275%，19.08%，15%和132%，而MFR最低，较纯PA6降低了73.33%。
채용화학확련적방법，장배양류확련제여니룡(PA)6통과쌍라간제출궤진행용융반응，제비고점도PA6，병대확련후적PA6특성점도、역학성능화류변행위진행료연구。결과표명，확련제적가입제고료PA6적특성점도、역학성능화평형뉴구，동시강저료용체류동속솔(MFR)。단확련제용량존재일개최가치，당확련제질량분수위0.9%시，확련후적PA6특성점도、결구충격강도、랍신강도、단렬신장솔、만곡강도、만곡탄성모량화평형뉴구균체도최대，상대우순PA6분별제고료86.25%，30.59%，21.44%，275%，19.08%，15%화132%，이MFR최저，교순PA6강저료73.33%。
Nylon 6 was melted by blending with the epoxy chain extender in a twin-screw extruder,for the purpose of preparing the high viscosity nylon 6 with the method of chemical chain extending. The intrinsic viscosity,mechanical properties and rheological behaviors of the nylon 6 after chain extending were characterized. Studies show that with the adding of the chain extender,the intrinsic viscosity,mechanical properties and balance torque of the nylon 6 after chain extending all increase, meanwhile,the melt flow rate (MFR) decreases. But the chain extender has a optimal content,when the mass fraction of the chain extender reaches 0.9%,the intrinsic viscosity,notched impact strength,tensile strength,elongation at break,bending strength, flexural modulus and balance torque of the nylon 6 after chain extending all reach maximum value and increases by 86.25%,30.59%, 21.44%,275%,19%,15%and 132%respectively comparing with original nylon 6,but MFR reaches minimum and decreases by 73.33%comparing with original nylon 6.