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Recycling and application of wasted polytetrafluoroethylene via high‐energy ball milling technology for nitrile rubber composites preparation
Author(s) -
Cao Changlin,
Liu Lichao,
Li Qiangpin,
Chen Pingqin,
Qian Qingrong,
Chen Qinghua
Publication year - 2016
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.24290
Subject(s) - materials science , polytetrafluoroethylene , composite material , nitrile rubber , crystallinity , scanning electron microscope , natural rubber , ball mill , differential scanning calorimetry , composite number , particle size , nitrile , chemical engineering , chemistry , organic chemistry , engineering , physics , thermodynamics
Wasted polytetrafluoroethylene fibers were recycled using high‐energy ball milling technique, and the recylced polytetrafluoroethylene (r‐PTFE) was employed to prepare nitrile rubber (NBR)/r‐PTFE composites. The structure of r‐PTFE and properties of NBR/r‐PTFE composites were investigated by polarized optical microscope, laser particle size analyzer, differential scanning calorimetry, and scanning electron microscopy, respectively. The results show that increasing the milling time from 4 to 7 h leads to decreasing the average particle size, the degree of crystallinity and the number‐average molecular weight of r‐PTFE, whereas no obvious change is found by further prolonging the milling time. It is also clear that the NBR/r‐PTFE composite with the r‐PTFE obtained from a longer milling time possesses a higher mechanical and solvent resistance property. Compared with pure NBR, NBR/r‐PTFE composites with r‐PTFE for 7 h milling show a 21.9% increase in modulus at 300% and 27.8% decrease in swelling index. POLYM. ENG. SCI., 56:643–649, 2016. © 2016 Society of Plastics Engineers