UV-induced acid–base chemistry within the PVC matrix

Abstract

PVC films containing methyl violet have been subjected to UV irradiation to induce dehydrochlorination leading to capture of the released HCl by the dye. It is demonstrated that a process similar to the indicator colour change in an aqueous solution can also be induced within the PVC matrix by the action of light. It is also shown that this process can be utilised for lithographic purposes. ᭧

Photosensitization of PVC dehydrochlorination by hydroquinone for improved optical and electrical properties

“…A similar study was also reported by Sidney et al for producing a radiochromic dosimeter film by incorporating acid-sensitive leuco dyes in chlorine-containing polymer matrix [12]. In one of our recent studies, we demonstrated that the UV-induced dehydrochlorination could also be used for lithographic purposes, where the color change of the methyl violet (MV) upon capture of the HCl released was utilized for the purpose [13]. Over the last two decades, PVC has also been used for various applications in the very active field of conducting and/or electroactive polymers, mostly, as the blending medium, for improving chemical and mechanical properties of the conducting polymers [14].…”

“…Fig. 1(b) shows the same set of spectra in the film containing also HQ irradiated at 312 nm, which clearly leads to extensive dehydrochlorination evidenced by both changes in the MV peaks and formation of polyenic sequences [10,13]. The picture shown in the inset is another proof of the effective sensitization process.…”

Chelating and Metal Ions Uptake Properties of Poly(m-Aminophenol -Furfural)

“…The band in the I.R spectrum of polymeric chelates due to υ c=c and υ c-o stretching at 1600 and 1100 cm 1 is attributed to υ c=c of the furfural ring and C-O-M respectively (17) . Morevore the appearance of bands in the region 600-200 cm 1 in the metal polymeric chelates supports the complexation and indicates the coordinated bands M-N and M-O (18) of υ m-n and υ m-o .…”

Photolithographic Patterning of a Conductive Polymer Using a Polymeric Photoacid Generator and a Traceless Removable Group

“…[14] In another report, it was shown that a PVC/ methyl violet mixture changes color when exposed to UV light. [15] These observed effects are possible because PVC behaves like a PAG and liberates hydrochloric acid when it is exposed to UV light. [16] Furthermore, it has been reported that the introduction of a small amount of hydroquinone sensitizes the process of dehydrochlorination of PVC.…”