Evaluation of the thermal stabilization effect of polymeric dioctyltin maleate on polyvinyl chloride

Bis (mercaptoethanol oleate) dimethyl tin was synthesized and added to polyvinyl chloride (PVC) with various ratios. Specimens were prepared by mixing and rolling through a double-roller mixer, and their static thermal stabilities were estimated by the oven static thermal aging experiments. The influence of the bis (mercaptoethanol oleate) dimethyl tin on the dynamic thermal stability of PVC was tested through a haack torque rheometer (HAAKE PolyLab QC). The tensile strength and rate of elongation at break of the PVC specimens were evaluated by a servo-controlled tensile testing machine. The results show that the bis (mercaptoethanol oleate) dimethyl tin has excellent static and dynamic thermal stabilization effect on PVC, and to some extent, can improve the breaking elongation rate the PVC sample.

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Enhanced thermal stabilization effect of hybrid nanocomposite of Ni–Al layered double hydroxide/carbon nanotubes on polyvinyl chloride resin

Polymer Degradation and Stability ◽

10.1016/j.polymdegradstab.2020.109153 ◽

2020 ◽

Vol 176 ◽

pp. 109153

Author(s):

Lipeng Fan ◽

Lan Yang ◽

Yanjun Lin ◽

Guoli Fan ◽

Feng Li

Keyword(s):

Carbon Nanotubes ◽

Layered Double Hydroxide ◽

Polyvinyl Chloride ◽

Thermal Stabilization ◽

Hybrid Nanocomposite ◽

Stabilization Effect ◽

Double Hydroxide

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Evaluation of the Thermal Stabilization Effect of Maleic Anhydride Derivatives on Polyvinyl Chloride

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.535-537.1167 ◽

2012 ◽

Vol 535-537 ◽

pp. 1167-1170

Author(s):

Jian Ping Liu ◽

Xia Song ◽

Wei Yuan ◽

Xiao Yan Wang

Keyword(s):

Thermal Stability ◽

Maleic Anhydride ◽

Thermal Degradation ◽

Polyvinyl Chloride ◽

Color Change ◽

Thermal Stabilization ◽

Test Paper ◽

Stabilization Effect ◽

Thermal Stability Of

Here, we synthesized a series of polymeric thermal stabilizers for polyvinyl chloride (PVC) based on maleic anhydride derivatives, including N-phenylmaleimide (NPMI), N-p-chlorophenyl maleimide (NCIPMI), N-p-nitrophenyl maleimide (NNOPMI), dibutyltin maleate (DBTM) and dioctyltin maleate (DOTM). Five specimens were prepared by mixing and rolling through a blending machine and a double-roller mixer, respectively. These samples were first subjected to thermal degradation in a 180°C hot oven, and fractions were collected every 10 min, followed by spotting on a slip of test paper. From the degree of color change in the test paper, the influences of these compounds on the thermal stability of PVC were estimated and such mechanisms were also discussed.

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Stabilization of a G-Quadruplex from Unfolding by Replication Protein A Using Potassium and the Porphyrin TMPyP4

Journal of Nucleic Acids ◽

10.4061/2011/529828 ◽

2011 ◽

Vol 2011 ◽

pp. 1-13 ◽

Cited By ~ 5

Author(s):

Aishwarya Prakash ◽

Fabien Kieken ◽

Luis A. Marky ◽

Gloria E. O. Borgstahl

Keyword(s):

Dna Replication ◽

Protein A ◽

Thermal Stabilization ◽

Replication Protein A ◽

Replication Protein ◽

Unique Problem ◽

Ssdna Binding ◽

Binding Domains ◽

G Quadruplex ◽

Stabilization Effect

Replication protein A (RPA) plays an essential role in DNA replication by binding and unfolding non-canonical single-stranded DNA (ssDNA) structures. Of the six RPA ssDNA binding domains (labeled A-F), RPA-CDE selectively binds a G-quadruplex forming sequence (5′-TAGGGGAAGGGTTGGAGTGGGTT-3′called Gq23). In K+, Gq23 forms a mixed parallel/antiparallel conformation, and in Na+Gq23 has a less stable (TMlowered by ∼20∘C), antiparallel conformation. Gq23 is intramolecular and 1D NMR confirms a stable G-quadruplex structure in K+. Full-length RPA and RPA-CDE-core can bind and unfold the Na+form of Gq23 very efficiently, but complete unfolding is not observed with the K+form. Studies with G-quadruplex ligands, indicate that TMPyP4 has a thermal stabilization effect on Gq23 in K+, and inhibits complete unfolding by RPA and RPA-CDE-core. Overall these data indicate that G-quadruplexes present a unique problem for RPA to unfold and ligands, such as TMPyP4, could possibly hinder DNA replication by blocking unfolding by RPA.

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