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Study on Compatibility of PET-PA66 and Preparation of Their Composite Fibrids
  
DOI：10.11980/j.issn.0254-508X.2018.07.005
Key Words:PET-PA66 composite fibrids  compatibility  surface morphology
Fund Project:陕西省2015科技统筹创新工程计划项目（2015KTCQ01-44） ; 陕西省造纸技术及特种纸品重点实验室项目（No.12JS024）; 陕西省教育厅重点科学研究计划（重点实验室）（No.17JS016）。
Author NameAffiliation
ZHANG Su-feng* Shaanxi Provincal Key Lab of Papermaking Technology and Specialty Paper Development，Key Lab of Paper Based Functional Materials of China National Light Industry，National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi’an, Shaanxi Province, 710021 
SONG Bao-yu Shaanxi Provincal Key Lab of Papermaking Technology and Specialty Paper Development，Key Lab of Paper Based Functional Materials of China National Light Industry，National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi’an, Shaanxi Province, 710021 
ZHANG Bin Shaanxi Provincal Key Lab of Papermaking Technology and Specialty Paper Development，Key Lab of Paper Based Functional Materials of China National Light Industry，National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi’an, Shaanxi Province, 710021 
ZHANG Mei-juan Shaanxi Provincal Key Lab of Papermaking Technology and Specialty Paper Development，Key Lab of Paper Based Functional Materials of China National Light Industry，National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi’an, Shaanxi Province, 710021 
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Abstract:Poly(ethylene terephthalate) (PET) polyamide 66 (PA66) composite fibrids were prepared by precipitation method. The effects of PA66 content on surface morphology, sizes, hydrophilicity and compatibility of composite fibrids and between PET and PA66 were investigated. What’s more, the strength properties of PET composite paper were also investigated. The results indicated that the surface morphology of the PET-PA66 composite fibrids was ribbonlike, with some wrinkleson the surface.With the increase of PA66 content, the fiber size decreased, the specific surface area of composite fibrid increased from 7.38 m2/g to10.12 m2/g, and the contact angle of composite fibrids decreased from 107 ° to 88 °. There was only one melting peak on the DSC curve which indicated that between PET and PA66 had good compatibility, and the stretching vibration peak at 1724.3 cm-1 in the FT-IR spectrum moved toward the low wave number direction, it indicated that the hydrogen bond between the two polymers was produced during the dissolution process, and the compatibility of the PET-PA66 system increased. With the increase of PA66 content, tensile index and tear index of PET composite paper increased 12.0% and 47.8%, respectively.
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