TPU原位成纤改性及其发泡性能研究
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摘要
用双螺杆挤出机制备聚氨酯(TPU)/聚四氟乙烯(PTFE)原位成纤材料。分析了PTFE含量对黏弹性和结晶性能的影响。研究了TPU/PTFE原位成纤材料的发泡性能。结果表明,在实验条件下,PTFE的增加有助于改善黏弹性,提高了结晶温度。PTFE的加入实现了微孔发泡。
The polyurethane( TPU)/poly tetra fluoro ethylene( PTFE) in-situ fiber forming material was prepared by twin-screw extruder. The effects of PTFE contents on viscoelasticity and crystallization properties were analyzed. The foaming properties of TPU/PTFE in situ fiber forming materials were studied.The results show that the viscoelasticity and the crystallization temperature of TPU are improved with PTFE contents increasing. Microcellular could be obtained with PTFE in-situ fibril addition.
The polyurethane( TPU)/poly tetra fluoro ethylene( PTFE) in-situ fiber forming material was prepared by twin-screw extruder. The effects of PTFE contents on viscoelasticity and crystallization properties were analyzed. The foaming properties of TPU/PTFE in situ fiber forming materials were studied.The results show that the viscoelasticity and the crystallization temperature of TPU are improved with PTFE contents increasing. Microcellular could be obtained with PTFE in-situ fibril addition.
引文
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[2]LIU T,YE L,LIU Y,et al.Synthesis and properties of polyester-based TPUs prepared by solution polymerisation[J].Plast Rubber Compos,2008,37(8):331-340.
[3]FARUK O,SAIN M.Continuous extrusion foaming of lignin enhanced thermoplastic polyurethane(TPU)[J].J Biobased Mater Bioenergy,2013,7(3):309-314.
[4]MICHAELI W,HEINZ R.Foam extrusion of thermoplastic polyurethanes(TPU)using CO2as a blowing agent[J].Macromol Mater Eng,2000,284-285(1):35-39.
[5]杜娟,牛家嵘,郑艳春.TPU发泡工艺及材料性能的研究[J].聚氨酯工业,2015,30(6):31-34.
[6]周成飞.热塑性聚氨酯交联技术的研究进展[J].橡塑技术与装备,2016(24):51-54.
[7]MI H Y,JING X,SALICK M R,et al.Approach to fabricating thermoplastic polyurethane blends and foams with tunable properties by twin-screw extrusion and microcellular injection molding[J].Adv Polym Technol,2013,33(1):631-643.
[8]PESETSKII S S,FEDOROV V D,JURKOWSKI B,et al.Blends of thermoplastic polyurethanes and polyamide 12:Structure,molecular interactions,relaxation,and mechanical properties[J].J Appl Polym Sci,2015,74(5):1054-1070.
[9]KROPP D,MICHAELI W,HERRMANN T,et al.Foam extrusion of thermoplastic elastomers using CO2as blowing A-gent[J].J Cell Plast,1998,34(4):304-311.
[10]MI H,JING X,SALICK M R,et al.A novel thermoplastic polyurethane scaffold fabrication method based on injection foaming with water and supercritical carbon dioxide as coblowing agents[J].Polym Eng Sci,2015,54(12):2947-2957.
[11]HOSSIENY N J,BARZEGARI M R,NOFAR M,et al.Crystallization of hard segment domains with the presence of butane for microcellular thermoplastic polyurethane foams[J].Polymer,2014,55(2):651-662.
[12]NICHETTI D,GRIZZUTI N.Determination of the phase transition behavior of thermoplastic polyurethanes from coupled rheology/DSC measurements[J].Polym Eng Sci,2010,44(8):1514-1521.
[13]GADLEY J L,ANDRADE R J,MAIA J M.Effect of softto-hard segment ratio on viscoelastic behavior of model thermoplastic polyurethanes during phase transitions[J].Macromol Mater Eng,2016,301(8):953-963.
[14]HUANG A,PENG X,TURNG L S.In-situ,fibrillated polytetrafluoroethylene(PTFE)in thermoplastic polyurethane(TPU)via melt blending:Effect on rheological behavior,mechanical properties,and microcellular foamability[J].Polymer,2017,134(1):263-274.
[15]林佩洁,邵群,FREDRICK N M,等.HGB/TPU复合泡沫材料的制备及泡孔结构研究[J].合成技术及应用,2012,27(4):5-9.