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Microinjection of poly(vinylidene fluoride) in the presence of various additives
Author(s) -
Chen Gang,
Nie Min,
Wang Qi
Publication year - 2018
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.21532
Subject(s) - microinjection , fluoride , metastability , zigzag , materials science , polar , polymer chemistry , microinjections , crystallography , chemical engineering , chemistry , organic chemistry , inorganic chemistry , physics , medicine , geometry , mathematics , astronomy , engineering , endocrinology
In this study, microinjections of poly(vinylidene fluoride) (PVDF) in the presence of polar additives were investigated. The experimental results showed that compared with the static state, the strong stress during microinjection was more conducive to generate β‐PVDF with electroactive property because it could promote the transition from trans‐gauche–trans‐gauche conformation to all‐ trans zigzag (TT) conformation. However, because metastable TT conformation easily relaxed back to trans‐gauche–trans‐gauche conformation with low energy, α‐PVDF coexisted with β‐PVDF in the microinjected pure PVDF. With the presence of polar additives, TT conformation formed during the microinjection was stabilized via special interaction between their polar groups and >CF 2 groups of PVDF, which was beneficial to the formation of β‐PVDF. As a result, PVDF microparts with rich β‐phases were prepared under the synergistic effects of external force field and special interaction. J. VINYL ADDIT. TECHNOL., 24:103–108, 2018. © 2016 Society of Plastics Engineers