PVC Morphology

Wypych, George

doi:10.1016/b978-1-895198-85-0.50005-4

Cited by 14 publications

(15 citation statements)

References 113 publications

(87 reference statements)

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“…UV absorbers can be used to stabilize a wide range of polymeric materials such as films, plastic and cosmetics. The mechanism by which such additives stabilize PVC involves direct light absorption, peroxide decomposers, radical and/or HCl scavengers [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. In addition, antioxidants are known as a common photostabilizer, which help in preventing the deterioration of plastics [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic, Physical and Topography of Photochemical Process of PVC Films in the Presence of Schiff Base Metal Complexes

2016

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Abstract:The photostability of poly(vinyl chloride), PVC, containing various Schiff base metal complexes (0.5% by weight) was investigated. Various indices corresponding to a number of functional groups were monitored with irradiation of polymeric films to determine their photostabilization activities. The quantum yield of the chain scission (Φcs) of modified polymeric films was found to be (1.15-4.65)ˆ10 6 . The surface morphology of a PVC sample was investigated by the use of atomic force microscope (AFM). The photostability of PVC films in the presence of Schiff base additives was found to follow the following order: PVC < PVC + CuL 2 < PVC + CdL 2 < PVC + ZnL 2 < PVC + SnL 2 < PVC + NiL 2 . Various mechanisms for PVC films photostability containing the Schiff base additives have been suggested.

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Section: Introductionmentioning

confidence: 99%

Spectroscopic, Physical and Topography of Photochemical Process of PVC Films in the Presence of Schiff Base Metal Complexes

2016

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“…Prior work has also demonstrated PVC’s compatibility in PCR applications; 26 however, this technique is most advantageous when used to determine the pH change associated with very high yield, lower temperature isothermal processes, such as LAMP. Nevertheless, the addition of additives 39 or in this case, baking the PVC to increase its thermostability in mineral oil adds the potential for droplet applications, such as digital PCR, that have gained popularity in recent years. 3 …”

Section: Resultsmentioning

confidence: 99%

Electrical Detection of Nucleic Acid Amplification Using an On-Chip Quasi-Reference Electrode and a PVC REFET

et al. 2014

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Electrical detection of nucleic acid amplification through pH changes associated with nucleotide addition enables miniaturization, greater portability of testing apparatus, and reduced costs. However, current ion-sensitive field effect transistor methods for sensing nucleic acid amplification rely on establishing the fluid gate potential with a bulky, difficult to microfabricate reference electrode that limits the potential for massively parallel reaction detection. Here we demonstrate a novel method of utilizing a microfabricated solid-state quasi-reference electrode (QRE) paired with a pH-insensitive reference field effect transistor (REFET) for detection of real-time pH changes. The end result is a 0.18 μm, silicon-on-insulator, foundry-fabricated sensor that utilizes a platinum QRE to establish a pH-sensitive fluid gate potential and a PVC membrane REFET to enable pH detection of loop mediated isothermal amplification (LAMP). This technique is highly amendable to commercial scale-up, reduces the packaging and fabrication requirements for ISFET pH detection, and enables massively parallel droplet interrogation for applications, such as monitoring reaction progression in digital PCR.

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“…56 It is known that some PVC stabilizers, including sulfur-containing organotins and maleate type organotins, can also decompose hydroperoxides. 58,59 Volatile peroxides are generated during the oxidation of polypropylene. 60 They may consist of hydrogen peroxide and small hydroperoxides, peroxides, and peroxyacids.…”

Section: Peroxide and Hydroperoxide Decompositionmentioning

confidence: 99%

“…Ca/Zn stearates and other compounds able to react with hydrogen chloride were long used as PVC thermal (and some as UV) stabilizers. 58,59 But acid neutralization is not only peculiar to PVC but is required by many other polymers.…”

Section: Acid Neutralizationmentioning

confidence: 99%

Mechanisms of Uv Stabilization

2015

Handbook of UV Degradation and Stabilization

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PVC Morphology

Cited by 14 publications

References 113 publications

Spectroscopic, Physical and Topography of Photochemical Process of PVC Films in the Presence of Schiff Base Metal Complexes

Spectroscopic, Physical and Topography of Photochemical Process of PVC Films in the Presence of Schiff Base Metal Complexes

Electrical Detection of Nucleic Acid Amplification Using an On-Chip Quasi-Reference Electrode and a PVC REFET

Mechanisms of Uv Stabilization

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