三聚氰胺氰脲酸盐复合尼龙6的形效关系.pdf

塑料工业
第41卷第7期
CHINA PLASTICS INDUSTRY
2013年7月
材料三聚氰胺氯尿酸盐复合尼龙6的形效关系
钱立军,汤朔
(北京工商大学材料科学与工程系,北京100048
摘要:具有棒状、近球状和片状三种形态的三聚氰胺氰脉酸盐(MCA)分别与尼龙6共混制备成MCA尼龙6复
合材料,并通过扫描电子显微镜、示差扫描量热仪、电子万能试验机、悬臂梁冲击试验机、熔体质量流动速率仪对其
物理机械性能进行了表征。结果表明,不同形态的MCA对复合材料的各项性能具有明显不同的影响,其中纳米片状
粒子(MCAC)对复合材料的性能影响最为明显,当MCA-C的质量分数达到8%时,复合尼龙6的拉伸强度较纯样
品提高了8%,拉伸断裂应力提高了29%,冲击强度提升了23%。其中拉伸强度的提高是由于纳米片状MCA粒子与
尼龙6形成了更多的分子间氢键相互作用;而冲击强度的提高可能是由于当复合材料受到外力冲击时,材料中的尼龙
发生弹性形变并在与MCA的界面处产生银纹而吸收冲击能量,从而提高了冲击强度。此外,由于MCA与基体的氢
键作用及其颗粒形状的影响,与纯尼龙6相比,MCA-C/尼龙6复合材料的熔体质量流动速率也降低了39%,而异相
成核作用导致复合材料的结晶温度由169℃升高至192℃。
关键词:形态;三聚氰胺氰脲酸盐;尼龙6;物理机械性能
DOI:10.3969/j.issn.1005~5770.2013.07.016
中图分类号:TQ326.6
文献标识码:A
文章编号:1005-5770(2013)07-0064-04
The Relation between Morphology and Property of Melamine
Cyanurate/PA6 Composites
QIAN Li-iun, TANG shuo
Department of Materials Science &Engineering, Beijing Technology and Business University, Beijing 100048, China)
Abstract: Three kinds of MCA with stick-like, sphere-like and slice-like morphologies were blended
with PA6 to prepare MCA/PA6 composites respectively. The
te physical-mechanical properties of PA6
composites were characterized by using scanning electron microscopy, differential scanning calorimeter
electromechanical universal testing machine, zod notched impact tester and melt flow rate tester. The results
showed that different morphologies of MCA had various influences on the properties of MCA/PA6 composites
The nano-slice-like MCA particlemca-)(content was 8%) had the most outstanding effect on the
physical-mechanical properties of composites. Namely, in contrast with that of pure PA6, the stretch
strength, break stress strength, impact strength of MCA-C/PA6 composite increased by 8%, 29% and 23%
respectively. The enhancement of stretch strength was caused by the more hydrogen bonds between nanoslice
like MCA and PA6; the increase of impact strength was the reason that the PA6 in composites can deform and
produce craze in the interface to absorb the impact energy when the composites receive external impact
Moreover, the morphology of MCAC and the hydrogen bonds interaction also reduced the melt index of MCA
C/PA6 composite by 39% and the crystallization temperature also increased from 169 C to 192 C due to the
heterogeneous nucleation compared with virgin PA6
Keywords: Morphology; MCA; PA6; Physical-mechanical Property
尼龙6是一种常用的工程塑料,具有强度高、耐具有举足轻重的地位2。三聚氰胺氰脲酸盐
油、耐磨、耐化学腐蚀、自润滑以及良好的加工性等(MCA)是阻燃尼龙6常用的一种无机铵盐阻燃剂,
诸多优良性能,在现代汽车制造业、电子工业等领域是一种具有规整氢键网络的化合物34。由于MCA
*北京市教育科研发展计刘面上项目(KM2011101010)
作者简介:钱立军,副教授,硕土生导师,主要从事阻燃材料研究。qianli@th.,btbu.edu.cn