Mechanochemically initiated polymerizations II. Influence of some factors on the mechanochemical homopolymerization of acrylonitrile by vibratory milling

Oprea, C. Vasiliu; Popa, Marcel

doi:10.1002/apmc.1980.050900102

Cited by 18 publications

(1 citation statement)

References 5 publications

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“…, the Oprea group reported that the ball-milling of acrylonitrile produces polyacrylonitrile even without additives. 151,165 All monomers presented in Scheme 1 do not require external initiators for ball-milling polymerisation. Both Oprea and Kuzuya proposed that the initiation step involves electron transfer from the milling material to the substrate.…”

Section: Mechanochemical Synthesis Of Linear Polymersmentioning

confidence: 99%

The mechanochemical synthesis of polymers

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Section: Mechanochemical Synthesis Of Linear Polymersmentioning

confidence: 99%

The mechanochemical synthesis of polymers

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Structure development and property changes in high density polyethylene during pan-milling

Huang¹

2000

J. Appl. Polym. Sci.

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A new self‐designed mechanochemical reactor, inlaid pan‐mill, was used in studying high density polyethylene (HDPE). The effects of pan‐milling stress on the structure and properties of HDPE were investigated. Gel permeation chromatography, melt indexer, Fourier transformed infrared spectroscopy, electron spectroscopy for chemical analysis, differential scanning calorimetry, X‐ray diffraction, capillary rheometer, and Instron material testing system were used to characterize the structures and evaluate the properties of HDPE. The results showed that mechanochemical degradation of HDPE occurred under the stress fields of pan‐mill, the molecular weight of HDPE was reduced, and HDPE with higher initial molecular weights were easier to degrade under the stress fields. Oxygen‐containing groups such as COOH, C=O, and C—O were introduced to HDPE chains as a result of degradation during milling. Crystallinity of HDPE first decreased slightly followed by gradual increases with increasing milling times; monoclinic crystals appeared after four cycles of milling and increased markedly with increasing milling times. Pressure oscillation in capillary flow occurred at significantly higher shear stress and shear rate for milled HDPE than unmilled HDPE. After milling, mechanical properties were improved. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 2016–2024, 2000

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Mechanochemically initiated copolymerizations. 5. Characterization of some binary and ternary copolymers obtained mechanochemically by vibratory milling

Oprea¹,

Popa²

1984

Acta Polymerica

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Vibratory milling proved to be a method of mcclianochenlical initiation of some copolymerization reactions for binary and ternary systems of vinyl comonomers. Some physico-chemical properties of t h e copolymers obtained b y this method are presented. The structure of t h e reaction products was characterized by means of I R and ESR spectroscopy, vapourphase osmometry and elemental analysis. Mechano-chemisch initiierte Copolymerisation. 5. Charakterisierung einiger biniirer und terniirerCopolymere, die mechanochemisch durch Schwingmahlung erhalten wurden Jlie Schwingmahlung wurde zur mechano-chemisehen Initiicrung der Copolymerisation von Vinylmonomcren eingesetzt. Einige physikalisch-chemische Eigenscliaftcri dcr auf diese Weise erhaltenen Copolymere werdcn mitgeteilt. I)ic St,ruktur der Reaktiorisproduktc wurde mittels IR-urid ESR-Spcktroskopie sowic durch Dampfdruckosmometrie und Elcmentaraualysc charakterisiert. Mexawxu.wuuecwm cononu.uepu3ayu~. 'lacmb .i. Oxapa~cmepu3osa~~ue nemmopbzx asoiinbzx u mpoiinbax cononu-.uepos, noayuemux -uexanoxu&uuecmM nyme.u npu sutjpayuonuow pa3.wanbisal~uu B~6 p o p a 3~o n o~ B03MOXFHO HHHUHHpOBaTb COIlOJlHMepH3a~HIO ABOfiHbIX H TpOfiIibIX CHCTeM BHHHJlbHblX COMOHO-MepOB . B pa6OTe PaCCMaTpHBaIOTCfl HeKOTOpbIe @H3PIKO-XHMHYeCKHe CBofiCTBa CHHTeTH3HpOBaHHbIX MeXaHOXHMH-YeCKHM IIyTeM COnOJlHMepOB. AJlfl CTpYKTYPHOrO OXapaKTepM30BaHHFI 3TEiX IIpOAYKTOB npHMeHHnHCb ~K-CneKTpO-CKOnHfl, anP-CneKTpOCKOIIHfl, OCMOMeTPHfl B IIapOBOfi @aBe H 3JIeMeHTapHbIfi aHaJIH3.

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Mechanochemically initiated polymerizations II. Influence of some factors on the mechanochemical homopolymerization of acrylonitrile by vibratory milling

Cited by 18 publications

References 5 publications

The mechanochemical synthesis of polymers

The mechanochemical synthesis of polymers

Structure development and property changes in high density polyethylene during pan-milling

Mechanochemically initiated copolymerizations. 5. Characterization of some binary and ternary copolymers obtained mechanochemically by vibratory milling

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