Effect of Catalyst Type on the Copolymerization of Styrene/1-Hexene and Exploring of Their Structural and Thermal Properties

Darounkola, Mohammad Reza Rostami; Bahri‐Laleh, Naeimeh; Nekoomanesh‐Haghighi, Mehdi; Rahmatiyan, Sanaz

doi:10.1134/s1560090419070029

Cited by 1 publication

(2 citation statements)

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“…The peaks at 3.7 and 1.4‐2.0 ppm are related to the protons of methoxy and methylene groups of MM units, respectively. In copolymer, methyl, methylene, and methane protons in the 1H had chemical shifts at 0.8 and 1.0–1.4 ppm, respectively [4,45,67,68] . The existence of resonance at 5.4‐5.7 ppm indicated that there is carbon‐carbon unsaturation content in some samples (see Figure S6) [69] .…”

Section: Resultsmentioning

confidence: 98%

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Microstructural, Thermal and Electrical Properties of Methyl Methacrylate and 1‐Hexene Copolymers Made by Dinuclear Ni‐Based Catalysts

2021

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Herein, we investigate the dinuclearity effect of α‐diimine Ni‐based catalysts, N1 and N2 bearing different backbone on methyl methacrylate/1‐hexene (MM‐1H) copolymerization and characterize the copolymers microstructures using FT‐IR and NMR. The monomer reactivity ratio (r) is calculated using three different methods, a high reactivity ratio for MM (r1=9.9611), whereas a low reactivity ratio is obtained for 1H (r2=−0.0226). As determined by NMR analyses, up to 96 % of the MM incorporated into the main chain. Thermal copolymer properties are studied by DSC and TGA analyses, and the results are compared with those of Poly (methyl methacrylate) (PMMA). The higher content of MM in the copolymer backbone and the higher Tg for the copolymer samples (95.5 to 105.6 °C) were obtained. TGA shows that the degradation temperature of copolymers with higher 1H content progression reduced by about 10 % weight‐loss for N1 (327 to 240 °C) and N2 (325 to 236 °C). We are using a novel method with a low‐cost and speedy determination of polymer conductivity in both solid and liquid phases, which indicates the semi‐conductivity property of poly(MM‐1H) using corona discharges under the air atmosphere. Synthesized graphene‐poly(MM‐1H) nanocomposite shows the electrical conductivity augment from 3.45 μS of the poly(MM‐1H) to 30.42 μS for its nanocomposite.

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Section: Resultsmentioning

confidence: 98%

“…Furthermore, the catalyst type and its structure are fundamental factors in controlling the polymer microstructure. Therefore, the reactivity ratio of monomers and catalyst structure are related to incorporating of monomers into the microstructure of the final polymer product [45–48] . Bagherabadi et al [32] .…”

Section: Introductionmentioning

confidence: 99%