Reactivity of vinyl ketones in free radical copolymerization with methyl methacrylate and vinyl acetate

Sastre, R.; Acosta, J. L.; Garrido, Rosario; Fontán, José

doi:10.1002/apmc.1977.050620107

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…It has also been reported that copolymerization greatly effects the glass‐transition temperature of the polymers 10. Moreover, while methyl methacrylate has been reported to be more reactive towards vinyl ketones,11 the thermal stability of poly(vinyl acetate) has been reported to be more. Also, the T g of poly(vinyl acetate) is comparable to poly(methyl methacrylate).…”

Section: Introductionmentioning

confidence: 99%

Microstructure determination and thermal studies ofn‐acryloylcarbazole/vinyl acetate copolymers

Brar

Singh

2006

J of Applied Polymer Sci

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Copolymers of N-acryloylcarbazole (A) and vinyl acetate (V) were synthesized by bulk polymerization using benzoyl peroxide (BPO) as free-radical initiator at 658C in different in-feed ratios. The composition of the copolymer was determined by H} NMR spectra of the copolymers were done by the help of distortionless enhancement by polarization transfer (DEPT) and two-dimensional NMR techniques such as heteronuclear single quantum coherence (HSQC) and total correlation spectroscopy (TOCSY). The methine and methylene carbon resonances were found to be compositional as well as configurational sensitive. The signals obtained were broad pertaining to the restricted rotation of bulky carbazole group. The thermal stability and glass-transition temperatures (T g ) of the copolymers were found to be dependant on polymer composition and characteristic of rotational rigidity of the polymer chain. Variation in the values of T g with the copolymer composition was found to be in good agreement with theoretical values obtained from Johnston and Barton equations.

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Section: Introductionmentioning

confidence: 99%

Microstructure determination and thermal studies ofn‐acryloylcarbazole/vinyl acetate copolymers

Brar

Singh

2006

J of Applied Polymer Sci

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Free Radical Copolymerization Reactivity Ratios

Greenley

1999

The Wiley Database of Polymer Properties

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Homopolymerization of isopropyl vinyl ketone and influence of the microstructure on the photodegradation of the polymer obtained

Acosta¹,

García²,

Sastre³

1978

Angew. Makromol. Chem.

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The kinetic equation of the radical polymerization of isopropyl vinyl ketone at 60°C using benzene as solvent and AIBN as initiator was determined. The influence of the microstructure on the photodegradation rate of atactic and crystalline poly(isopropy1 vinyl ketone) (PIVK) was also investigated. The photolysis of atactic and crystalline samples of PIVK was carried out in solu1ion and 111 IIIC solid state. By effect of radiation, crosslinking and chain-scission, or only chain-scission, was observed, this behaviour was depending on the aggregation state of the sample. It was proved that the chain mobility plays the main role in the photodegradation of PIVK. Z USAMMENFASSUNG : Die kinetische Gleichung fur die radikalische Polymerisation von Isopropyl-vinyl-keton in Benzol als Losungsmittel mit AIBN als Initiator bei 60°C wurde bestimmt. Der EinfluR der Mikrostruktur auf die Photoabbaugeschwindigkeit von ataktischem und kristallinem Poly-isopropyl-vinyl-keton (PIVK) wurde auch untersucht. Die Photolyse von ataktischen und kristallinen Polymeren wurde sowohl in Losung als auch im Festzustand durchgefuhrt. Die Bestrahlung verursacht Kettenspaltungen und Kettenverzweigungen oder nur Kettenspaltungen; dieses Verhalten h h g t von der Packungsdichte des Polymeren ab. Es wurde festgestellt, daR die Kettenbeweglichkeit eine wichtige Rolle beim Photoabbau von PIVK spielt.

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Reactivity of vinyl ketones in free radical copolymerization with methyl methacrylate and vinyl acetate

Cited by 5 publications

References 6 publications

Microstructure determination and thermal studies ofn‐acryloylcarbazole/vinyl acetate copolymers

Microstructure determination and thermal studies ofn‐acryloylcarbazole/vinyl acetate copolymers

Free Radical Copolymerization Reactivity Ratios

Homopolymerization of isopropyl vinyl ketone and influence of the microstructure on the photodegradation of the polymer obtained

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