Thermal performance and phase transformation of S-alkylated poly(vinyl chloride) comb-like polymers

Xu, Hongqi; Gao, Yahui; Li, Jing; Wang, Haixia; Shi, Haifeng

doi:10.1016/j.polymer.2018.08.036

Cited by 18 publications

(33 citation statements)

References 41 publications

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“…[54][55][56] In the case of POEGMA-long, g POEGMA demonstrates a change in its E act (from 0.38 to 0.55 eV, Table 2) at higher temperatures. In a very recent work, Czaderna-Lekka et al 28 studied by BDS several poly(oligo(ethylene glycol) methyl ether methacrylate) (POEG-MEA) networks including samples with similar numbers of oxyethylene groups (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19). They recorded a g process with a similar time scale to that of g POEGMA here, slightly lower E act B 0.26 eV (24.9 kJ mol À1 ) and attributed its origins to the dipole moments of the ending methoxyl groups.…”

Section: Molecular Dynamics -Dielectric Spectroscopymentioning

confidence: 99%

“…5,16 It is widely accepted that factors such as the backbone rigidity, the nature of the linking groups, and the length of the side chains affect significantly the side chain crystallization. 5,18 In the case of PEG side chains, the reported results have indicated that the crystallization temperature, T c , decreases as compared to linear long PEG [poly(ethylene oxide), PEO] macromolecular chains and the degree of supercooling depends strongly on the length of the side chains, with T c ranging from slightly below 0 1C to about 65 1C. 6,[14][15][16] Furthermore, it has been shown that crystallization in the brush copolymers was hindered by frustration in packing of the crystallizable PEG chains which can be realized either in the interdigitating or the end-to-end form.…”

Section: Introductionmentioning

confidence: 99%

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Molecular dynamics and crystallization in polymers based on ethylene glycol methacrylates (EGMAs) with melt memory characteristics: from linear oligomers to comb-like polymers

et al. 2021

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Section: Molecular Dynamics -Dielectric Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Molecular dynamics and crystallization in polymers based on ethylene glycol methacrylates (EGMAs) with melt memory characteristics: from linear oligomers to comb-like polymers

et al. 2021

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“…Covalent attachment of plasticizers to PVC chains, internal plasticization, is an effective way to avoid migration of plasticizers from the PVC. Reports of internal plasticization using sulfide and amine attachments to PVC demonstrate impressive reduction of the T g values. However, sulfide linkers are susceptible to oxidation, leading to both discoloration and degradation over time.…”

Section: Introductionmentioning

confidence: 98%

Internal plasticization of poly(vinyl) chloride using glutamic acid as a branched linker to incorporate four plasticizers per anchor point

Tek

Wojtecki

et al. 2019

J. Polym. Sci. Part A: Polym. Chem.

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Internal plasticization of polyvinyl chloride (PVC) using thermal azide‐alkyne Huisgen dipolar cycloaddition between azidized PVC and electron‐poor acetylenediamides incorporating a branched glutamic acid linker resulted in incorporation of four plasticizing moieties per attachment point on the polymer chain. A systematic study incorporating either alkyl or polyethylene glycol esters provided materials with varying degrees of plasticization, with depressed Tg values ranging from −1 °C to 62 °C. Three interesting trends were observed. First, Tg values of PVC bearing various internal plasticizers were shown to decrease with increasing chain length of the plasticizing ester. Second, branched internal plasticizers bearing triethylene glycol chains had lower Tg values compared to those with similar length long‐chain alkyl groups. Finally, thermogravimetric analysis of these internally plasticized PVC samples revealed that these branched internal plasticizers bearing alkyl chains are more thermally stable than similarity branched plasticizers bearing triethylene glycol units. These internal tetra‐plasticizers were synthesized and attached to PVC‐azide in three simple synthetic steps. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 1821–1835

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“…Recent studies have shown that PVC/NBR (nitrile-butadiene rubber) mixtures can be used to obtain fuels-resistant products such as biodiesel. However, these mixtures have a complex formula that includes: NBR/PVC, conductive carbon black; rice husk ash containing at least 90% SiO2; synthetic amorphous silica; graphene oxides involving high costs [ 39 ]. The solution proposed in the research offers the possibility to obtain a rubber/PVC mixture that has a formula that includes reclaimed rubber and PVC particles obtained from waste, thus being able to obtain much cheaper products.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Composites Materials with Rubber Matrix and with Polyvinyl Chloride Addition (PVC)

Dobrotă

Petrescu

Dimulescu³

et al. 2020

Polymers

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An important problem that arises at present refers to the increase in performances in the exploitation of the conveyor belts. Additionally, it is pursued to use some materials, which can be obtained by recycling rubber and PVC waste, in their structure. Thus, the research aimed at creating conveyor belts using materials obtained from the recycling of rubber and PVC waste. Under these conditions, conveyor belts were made that had in their structure two types of rubber and PVC, which was obtained by adding in certain proportions of reclaimed rubber and powder obtained from grinding rubber waste. In order to study the effect of adding PVC on properties, four types of conveyor belts were made, with the structure of rubber, PVC and textile reinforcement. These have been subjected to certain mechanical tests, also being analyzed from the point of view of the behavior of the accelerated aging. The results obtained showed that the addition of PVC lead to a decrease in tensile stress for the strips made, but also an increase in the tensile strain. Additionally, the elasticity tests performed before and after the accelerated aging showed that the presence of PVC in the structure of the conveyor belts determined a substantial reduction of the aging process of the rubber in the conveyor belts. Under these conditions, it has been established that the use of PVC in the structure of rubber matrix conveyor belts is beneficial if conveyor belts are to be produced that are less subject to mechanical stress, but that work in conditions that can cause accelerated aging of materials. An analysis with the finite element method (FEM) of the test samples was also performed.

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Thermal performance and phase transformation of S-alkylated poly(vinyl chloride) comb-like polymers

Cited by 18 publications

References 41 publications

Molecular dynamics and crystallization in polymers based on ethylene glycol methacrylates (EGMAs) with melt memory characteristics: from linear oligomers to comb-like polymers

Molecular dynamics and crystallization in polymers based on ethylene glycol methacrylates (EGMAs) with melt memory characteristics: from linear oligomers to comb-like polymers

Internal plasticization of poly(vinyl) chloride using glutamic acid as a branched linker to incorporate four plasticizers per anchor point

Preparation and Characterization of Composites Materials with Rubber Matrix and with Polyvinyl Chloride Addition (PVC)

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