Microscopic investigations of the liquid‐induced crystallization of the system bisphenol a polycarbonate/carbon tetrachloride

Abstract

The rate of growth of spherulites and the kinetics of crystallization OI a carbon tetrachloride-swollen Bisphenol A polycarbonate were determined in the temperature range from 308 K to 343 K by means of an optical microscope.The optical nature of the forming spherulites was investigated. Changes of the final degree of swelling with temperature were determined gravimetrically. Mikroskopische Untersuchung der flussigkeits-induzierten Kristallisation des Systems Polycarbonat (Bisphenol A ) / TetrachlormethylenMit Hilfe der optischen Mikroskopie wurden im Temperaturbereich von 308 K bis 343 K die Geschwindigkeit des Sphiirolithwachstums und die Kristallisationskinetik des in CCI, gequollenen Polycarbonats aus Bisphenol A bastimmt. Der optische Charakter der gebildeten Spharolithe wurde untersucht. Die Temperaturabhangigkeit des Endquellungsgades wurde gravimetrisch bestimmt. ((aHHOn x p u c m a a u a a y u u cuemeabz nosuxap6onam (Guc@enon A) lmempaxnopwemuneIc c@eponmoB H KHHeTma KpHcTannmaI[m ~a6yxmero B CCn, n o n m~a p 6 0~a r a Ha ocHoBe 6xc@eHona A. Hccnepo-(: IIOMOIIJbH, OIITHqeCKOm MHKPOCKOIIHH OIIpeAeJIRJIaCb B o6nac~a Te?EIIepaTyp OT 308 A0 343 CKOpOCTh pOCTa BaJIaCb OIITHYeCHaH IIpHpOAa 06pa30BaHHbIX C@ePOnMTOB. rpaBHMeTpH9eCHHM MeTOAOM OIIpeAenRJIaCb TeMIIepaTyp-H a R SaBXCMMOCTb HOHeYHOa CTeIIeHH ~a 6 y x a~~~. Muxpocxonuuecxoe uccaedosame ~uaxoCmFLo-U~ayyUPO

Effective enhancement of poly(bisphenol-A carbonate) crystallinity with polyamide-66 ionized nucleation through ion-dipole interactions coupled with plasticization

“…The addition of plasticizers can enhance the movement of molecular chains and thus promote the crystal growth. For instance, common PC plasticizers include organic solvents such as acetone [20][21][22], carbon tetrachloride [23,24], tetrahydrofuran [24,25], ethyl acetate [26], chloroform [27], and supercritical CO 2 (SCCO 2 ) [28,29] can enhance the free volume and movement of PC molecular chains, and promote the ordering of molecular chanis into regular helica segments, which serve as crystal nuclie to initiate PC crystalization. Similarlly, flexible polymers such as polycaprolactone [30,31], polyethylene glycol [32], epoxy resins [33], esters such as diallyl phthalate [34], tributyl citrate [35,36], and small molecule liquid crystals such as cholesterol nonanoate (CN) [37,38] enhance the flexibility of PC to alevate the crystal growth.…”