Antistatic modification of synthetic fibers by blend‐spinning of polymers containing zwitterionic antistatic modifiers and their copolymers

Abstract

New poly(oxyethy1ene) derivatives (S-betaine) having a zwitterionic structure of ammoniumsulfonate were prepared by the reaction of oxirane (EO) adducts of stearylamine with sodium chloromethanesulfonate and examined as blending antistatic modifiers for poly(ethy1ene terephthalate) (PET) and polyamide 6 (PA6) fibers. The blend PET and PA6 fibers containing 2.0 wt.-Yo of S-betaine exhibited a decreased halflife time of leakage of electrostatic charge (t,,2) and a surface area resistivity (RJ compared with those of the control PET and PA6 fibers. However, their antistatic properties were almost lost after repeated washings, because of the extraction of the agents. To increase the resistivity to washing, copolyester-type modifiers comprising both S-betaine and poly(ethy1ene glycol) were synthesized and incorporated into PET fibers. It was found that the antistatic properties of the blend PET fibers obtained can be retained even after dyeing and repeated washings. ZUSAMMENFASSUNG:Durch Reaktion von Addukten aus Oxiran und Stearylamin mit Natriumchlormethansulfonat wurden neuartige Polyethylenoxidderivate (S-Betain) hergestellt, die hinsichtlich ihrer Eignung als antistatische Modifikatoren fur Polyethylenterephthalat(PET)-und Polyamid-6(PA6)-Fasern gepruft wurden. Die Halbwertszeit des Abbaus der elektrostatischen Ladung und der Oberflachenwiderstand von PET-und PA6-Fasern mit 2.0 Gew.-To S-Betain sind geringer als die der unmodifizierten Fasern. Wiederholtes Waschen verringert jedoch die antistatischen Eigenschaften, da der Modifikator ausgewaschen wird. Um dies zu verhindern, wurden copolymerartige Modifikatoren mit sowohl S-Betainals auch Polyethylenglykol-Strukturen hergestellt und in die Fasern eingearbeitet. Damit bleiben die antistatischen Eigenschaften der PET-Fasern auch nach Farben und wiederholtem Waschen erhalten.

Thermosensitive surface properties of polyethylene film with poly(N-isopropylacrylamide) chains prepared by corona discharge induced grafting

“…Attempts have been made to compared to the original PE. As is evident from the strong O 1s band and the high binding energy impart hygroscopic properties to polymers for the antistatic modification by Sano et al [16][17][18] The an-of the C 1s components, which is due to oxidized carbon groups, a large amount of oxygen atoms tistatic property of PolyNIPAAm-g-PE was improved below 30ЊC, as shown in Figure 8. How-was introduced to the PE surface by the corona discharge method.…”

Surface modification of synthetic fiber nonwoven fabrics with poly(acrylic acid) chains prepared by corona discharge induced grafting

“…After charging the fabric with 10 kV for 30 s, the period of time in which the charge potential attenuated to 1/2 of the initial potential (T 1/2 ) was observed at 20 8C under 65% RH. Throughout the measurements, the fabric-fixed turntable was rotated at 1000 rpm [18][19][20][21] . In this study, the charge potential of some fabrics did not attenuate to 1/2 of the initial potential even after 2 min had passed, and therefore the percentage of leakage after 5 min (LEC) was calculated instead.…”

Surface grafting of poly(vinylamine) onto poly(ethylene) film by corona discharge-induced grafting

“…After charging the film with 10 kV for 30 s, the period of time in which the charge potential attenuated to $\hbox{$1\over 2$}$ of the initial potential was observed at 20°C under 65% RH. Throughout the measurements, the film‐fixed turntable was rotated at 1000 rpm 14–20. In this study, as the charge potential did not attenuate to $\hbox{$1\over 2$}$ of the initial potential even after 120 s, the percentage of leakage after 5 min was calculated by estimating the electrostatic propensity.…”