1993
DOI: 10.1002/pat.1993.220040802
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Kinetic behavior of UV‐sensitive polymers from modified natural rubber

Abstract: Photosensitive copolymers have been obtained by chemical modification of natural rubber. The introduction of the photoreactive cinnamoyl group in different conversions has been carried out by the reaction of natural polyisoprene with maleic anhydride, followed by ring opening and condensation with some oxyalkylcinnamate esters. These reactions gave rise to five polymer series. Each series, for which the anhydride content was kept constant, is constituted of five copolymeric products, differing from each other … Show more

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Cited by 4 publications
(3 citation statements)
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“…The time scale for absorbance consists of two distinct regimes (Figure 4). The initial phase consists of a rapid decrease in absorbance that lasts for several seconds and represents cis-trans isomerizaton [36]. The secondary phase is associated with the solid state photodimerization reaction in PGS-CinA [36], which obeys second order reaction kinetics [37].…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The time scale for absorbance consists of two distinct regimes (Figure 4). The initial phase consists of a rapid decrease in absorbance that lasts for several seconds and represents cis-trans isomerizaton [36]. The secondary phase is associated with the solid state photodimerization reaction in PGS-CinA [36], which obeys second order reaction kinetics [37].…”
Section: Resultsmentioning
confidence: 99%
“…The initial phase consists of a rapid decrease in absorbance that lasts for several seconds and represents cis-trans isomerizaton [36]. The secondary phase is associated with the solid state photodimerization reaction in PGS-CinA [36], which obeys second order reaction kinetics [37]. The experimental kinetics are accurately described by the following second rate equation in which the absorbance A has a rate constant of k = 2.5 msec −1 and an initial value of A 0 = 0.876.…”
Section: Resultsmentioning
confidence: 99%
“…Kinetic alkylcinnamate esters, each of the maleated polytreatment of the obtained data followed the proceisoprenes gave rise to a set of compounds in which dure described before. 14 The observed rate conthe alkyl moiety had a number of {CH 2 { groups stant, k obs , for each product was calculated acvarying from 2 to 6, with the following struccording to the following equation: ture 13 :…”
Section: Resultsmentioning
confidence: 99%