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SYNTHESIS AND PHOTOSTABILITY OF NEW POLYMERS DERIVED FROM PVC

SYNTHESIS AND PHOTOSTABILITY OF NEW POLYMERS DERIVED FROM PVC
von Noora Asaad - Verkauft von Dodax
Zustand: Neu
CHF 50.05
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Noora Asaad SYNTHESIS AND PHOTOSTABILITY OF NEW POLYMERS DERIVED FROM PVC
Noora Asaad - SYNTHESIS AND PHOTOSTABILITY OF NEW POLYMERS DERIVED FROM PVC

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Lieferung: zwischen 2020-12-14 und 2020-12-16
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Beschreibung

The influence of introducing 1,3,4-thiadiazole and phthalyl groups as a pending groups into the repeating unit of PVC has been studied on the bases of photostability measurements. The photostability of modified. polymers were studied by monitoring the carbonyl Index, polyene index and hydroxyl index, All results obtained indicated that PI, PII, PIII, PIV and PV gave lower growth rate of ICO, IPO and IOH with irradiation time with respect to unmodified PVC film (control). The following trends of photostability are obtained PIPIIPIIIPIVPV According to the experimental results several reaction mechanisms were proposed depending on the presence of 1,3,4-thiadiazole and phthalyl groups moieties in the polymer chain. The mode of chain scission was also investigated by measuring the variation of average viscosity molecular weight with irradiation time for modified PVC. The degree of deterioration ( ) and the average number of chain scission (S) values were also calculated.

Mitwirkende

Autor Noora Asaad

Autor Emad Yousif

Autor Ayad Hameed

Produktdetails

DUIN 1FV1FCRDFVC

GTIN 9783843390286

Sprache Englisch

Seitenanzahl 108

Produkttyp Taschenbuch

CHF 50.05
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