摘要
用硅烷偶联剂KH560改性了纤维素纳米晶(CNC),热失重和红外分析证实了KH560接枝在CNC表面上。采用差示扫描量热、偏光显微镜研究了CNC和硅烷化纤维素纳米晶(KCNC)对等规聚丙烯(iPP)结晶行为的影响,并进一步分析了iPP/CNC和iPP/KCNC复合材料的物理性能和流变性能。研究结果表明:硅烷化的KCNC在iPP基体中分散更为均匀,相比于iPP/CNC复合材料,iPP/KCNC复合材料的球晶尺寸更细,iPP/KCNC复合材料的结晶速率、结晶度和结晶温度增加更为明显,表现出更优异的透明性能。硅烷化改性的KCNC还进一步提高了iPP的储能模量、耗能模量和力学性能。
The silane coupling agent(KH560)was used to modify the cellulose nanocrystals(CNC).Thermal gravimetric analysis and infrared analysis confirmed that KH560 was grafted on the surface of CNC.Differential scanning calorimetry and polarizing microscopy were used to study the effects of CNC and silanized cellulose nanocrystals(KCNC)on the crystallization behavior of isotactic polypropylene(iPP).The physical properties and rheological properties of iPP/CNC and iPP/KCNC composite materials were further analyzed in this study.The results demonstrate that the silanized KCNC are more uniformly dispersed in the iPP matrix,the spherulite size of the iPP/KCNC composite is more refined,and the crystallization rate,crystallinity and crystallization temperature of the iPP/KCNC composite increase more significantly.IPP/KCNC composite show excellent transparency performance.The silanized KCNC further improve the storage modulus,loss modulus and mechanical properties of iPP.
作者
伍昌维
梁兆华
李娟
胡智
Wu Changwei;Liang Zhaohua;Li Juan;Hu Zhi(Guizhou Provincial Product Quality Inspection and Testing Institute,Guiyang 550014,China;Guizhou Tire Co.,Ltd.,Guiyang 550003,China;ChinaGuizhou Material Industrial Technology Institute,Guiyang 550014,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2021年第9期115-119,共5页
Engineering Plastics Application
基金
贵州省科技计划项目([2020]4Y223)
贵州省高层次创新型人才项目([2019]5630)
贵州省科技计划项目([2019]2029)。
关键词
成核剂
等规聚丙烯
纤维素纳米晶
结晶行为
nucleating agent
isotactic polypropylene
cellulose nanocrystal
crystallization behavior
