摘要
以聚丙烯(PP)为基体及纳米云母为改性剂,用混炼法制备纳米云母/聚丙烯复合材料。对未改性的纳米云母、烷基改性的纳米云母及甲基丙烯改性的纳米云母与聚丙烯的复合材料的力学性能和热性能进行比较分析。结果表明,经傅里叶变换红外光谱(FTIR)分析,证实纳米云母已成功改性,由扫描电子显微镜(SEM)分析,云母粉末为纳米级,改性影响了聚丙烯和云母之间的结合性,与未改性的云母相比,改性云母的各项性能较好。通过X射线衍射(XRD)分析,纳米云母不会影响聚丙烯的结晶行为和收缩关系。在力学性能方面,纳米云母(1 phr)虽然可以增加拉伸强度,但随着纳米云母的添加增加至7 phr,复合材料变硬变脆而下降,拉伸强度略微下降,冲击强度显著下降,而拉伸模量和表面硬度都提高10%以上,表明改性后的纳米云母与聚丙烯融合性更强。在热性能方面,在7 phr 纳米云母添加量下,其维卡软化温度提高约10%,表明添加烷基改性比甲基丙烯改性云母的复合材料稳定性更好;随着云母添加量增加,耐热性提升效果明显,但因改性剂会先裂解,导致改性的纳米云母降低了纳米复合材料的耐热性。
Taking polypropylene(PP)as matrix and self-prepared nano-mica as modifier,the PP/nano-mica composite was prepared by melt compounding.The mechanical properties and thermal properties of polypropylene/nano-mica composites were discussed,including non-modify nano-mica,alkyl-modify nano-mica and methacrylic-modify nano-mica.The results show that the nano mica has been successfully modified by fourier transform infrared spectrometer(FTIR).The mica is nano-scale and the modification has influenced bound force between polypropylene and mica by scanning electron microscope(SEM)analysis.Comparing with the unmodified mica,the modified mica has better properties.Nano-mica could not affect the crystallization behavior of polypropylene and the nexus of contracts by X-ray diffraction(XRD)analysis.For the mechanical properties,when the content of nano mica is 1 phr,the nano-mica could enhance its tensile strength.However,when the nano-mica content increases to 7 phr,the material has been stiffening and changes crisp.The tensile strength decreases slightly,and the impact strength decreases significantly,the tensile modulus and surface hardness of polypropylene-modified are increased more than 10%,which proves that the modified mica has better bonding.The Vicat softening temperature increases about 10%with the addition of 7 phr nano mica,alkyl-modified nano-mica composites exhibit better stability than methacrylic-modified.With the increase of mica content,the heat resistance increases significantly,however,the dissociation of modifier could decrease the heat resistance of nano composites.
作者
巫少龙
魏小华
徐建亮
WU Shao-long;WEI Xiao-hua;XU Jian-liang(School of Mechanical and Electrical Engineering,Quzhou College of Technology,Quzhou 324000,China;School of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310014,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2020年第6期61-67,134,共8页
China Plastics Industry
基金
浙江省教育厅科研项目(Y201839845)
浙江省教育厅高校访问工程师校企合作项目(FG2018160)
衢州市科技计划项目(2018S04)。
关键词
纳米复合材料
聚丙烯
云母
力学性能
热性能
Nanocomposites
Polypropylene
Mica
Mechanical Properties
Thermal Performance
