纳米SiO_2对UHMWPE溶液流变性质及其结晶性能的影响  

Effects of Nano-SiO_2 on the Rheological and Crystalline Properties of UHMWPE Solution

作　　者：于俊荣[1] 胡祖明[1] 刘兆峰[1] 

机构地区：[1]东华大学纤维材料改性国家重点实验室,上海200051

出　　处：《东华大学学报（自然科学版）》2005年第6期1-5,共5页Journal of Donghua University(Natural Science)

基　　金：上海市青年科技启明星计划项目(03 QF14001);上海高校优秀青年教师后备人选科研项目资助

摘　　要：将纳米SiO2经偶联剂处理后,采用溶液共混法制成UHMWPE/纳米SiO2溶液。研究了表面处理后纳米SiO2在UHMWPE中的分散性能和纳米粒子及抗氧剂的添加对溶液粘度及结晶性能的影响。结果表明:表面处理后纳米SiO2在UHMWPE溶液中可达到纳米级均匀分散;溶液粘度及粘流活化能随纳米粒子加入量的增加而增大;抗氧剂和纳米粒子的添加对PE的结晶形态都没有影响;抗氧剂的加入使UHMWPE的结晶度变大,晶粒尺寸变小,而纳米SiO2粒子的加入使UHMWPE的结晶度变小,晶粒尺寸变大。Nano-SiO2 are treated with coupling agent and then added into UHMWPE by solution incorporating method. The dispersing property of surface treated nano-SiO2 and effects of nano-SiO2 and antioxidant on the viscosity and crystalline properties of UHMWPE solution are investigated. The results show that nano-SiO2 could be dispersed in nano-size in UHMWPE solution. The viscosity and ΔEη of UHMWPE solution increases with the increasing of nano-SiO2 concentration. The adding of nano-SiO2 and antioxidant cannot change the crystal morphology of polyethylene. The crystallinity increases and crystal size decreases with the adding of antioxidant, while the crystallinity decreases and crystal size increases with the increasing of nano-SiO2 concentration.

关 键 词：纳米SIO2 表面处理 UHMWPE溶液 流变性质 结晶性能 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ340.61[化学工程—化纤工业]