Crosslinking of plasticized PVC used in coated fabrics

Ali, Zulfiqar; Esmaeili, Mohammad; Ghaeli, I.

doi:10.1002/vnl.20178

Cited by 6 publications

(4 citation statements)

References 37 publications

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“…However, because the crosslinking of PEs with DCP was carried out by the thermoreactive melt process, the decomposed peroxides might also have induced the thermal decomposition of PE molecules, especially in the case of nonbranched PE such as HDPE. This effect may be another reason for the insignificant enhancement of the normalized gel content of the HDPE with increasing DCP content .…”

Section: Resultsmentioning

confidence: 99%

Thermal characteristics and temperature profile changes of structurally different polyethylenes with peroxide modifications

Likhitlert

Wongchaleo

Kositchaiyong

et al. 2014

Vinyl Additive Technology

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Crosslinking and processing characteristics of polyethylenes (PEs) with different molecular architectures, namely high‐density polyethylene (HDPE), linear low‐density polyethylene (LLDPE), and low‐density polyethylene (LDPE), were studied with regard to the effects of peroxide modifications and coolant flow rates. Dicumyl peroxide (DCP) and di‐tert‐butyl peroxide (DTBP) were used as free‐radical inducers for crosslinking the PEs. The characteristics of interest included normalized gel content, real‐time temperature profiles and their cooling rates, exothermic period, crystallinity level, crystallization temperature, and heat distortion temperature. The experiments showed that LDPE exhibited the highest normalized gel content. The real‐time cooling rates, taken from the temperature profiles for all PEs before the crystallization region, were greater than those after the crystallization region. The cooling rate of the PEs increased with the presence of DCP, whereas the crystallization temperature of the PEs was lowered. The HDPE appeared to show the longest exothermic period as compared with those of the LLDPE and LDPE. The exothermic period showed an increase with increasing coolant flow rate, but it was decreased by the use of DCP. As for the effect of peroxide type, the gel content and cooling rate of the PE crosslinked by DCP were higher than those for the PE crosslinked by DTBP. The DTBP was the more effective peroxide for introducing crosslinks and simultaneously maintaining the crystallization behavior of the PE. J. VINYL ADDIT. TECHNOL., 20:80‐90, 2014. © 2014 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Thermal characteristics and temperature profile changes of structurally different polyethylenes with peroxide modifications

Likhitlert

Wongchaleo

Kositchaiyong

et al. 2014

Vinyl Additive Technology

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“…The main methods used to improve the heat resistance of PVC involve the modification of the cross-linking of the materials [18]. Common modifiers are organosilanes [19][20][21], peroxides [20,22], triazine compounds [23], isocyanates [24], etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of a Lightweight, High-Strength, and Heat-Resistant Rigid Cross-Linked PVC Foam

Jiang

Wang

et al. 2023

Polymers

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A rigid poly(vinyl chloride) foam with a cross-linked network structure was prepared by adding 3-glycidoxypropyltriethoxysilane (KH-561) into the universal formulation. The resulting foam had excellent heat resistance because of the increasing degree of cross-linking and number of Si–O bonds with a high heat resistance. The as-prepared foam was verified using Fourier-transform infrared spectroscopy (FTIR), energy-dispersive spectrometry (EDS) and foam residue (gel) analysis, which demonstrated that KH-561 was successfully grafted and cross-linked on the PVC chains. Finally, the effects of different KH-561 and NaHSO3 additions on the mechanical properties and heat resistance of the foams were studied. The results showed that the mechanical properties of the rigid cross-linked PVC foam were raised after adding a certain amount of KH-561 and NaHSO3. The residue (gel), decomposition temperature, and chemical stability of the foam significantly improved compared to the universal rigid cross-linked PVC foam (Tg= 72.2 °C). The Tg of the foam could reach 78.1 °C without any mechanical degradation. The results have important engineering application value regarding the preparation of lightweight, high-strength, heat-resistant, and rigid cross-linked PVC foam materials.

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“…[ 30 ] In the peroxide treatment, crosslinking can be activated at elevated temperature in the presence of peroxide or PVC and acrylate mixtures can be reacted in the presence of peroxides for the ultimate network formation. [ 23,31,33 ] However, peroxides may promote degradation rather than crosslinking and therefore, they have been rarely used alone for PVC crosslinking. Alternatively, the crosslinking reaction of plasticized PVC was achieved through difunctional amines.…”

Section: Introductionmentioning

confidence: 99%

Self‐Healable and Recyclable Sulfur Rich Poly(vinyl chloride) by S–S Dynamic Bonding

Deliballi

Demir‐Cakan

Kışkan

et al. 2022

Macro Chemistry & Physics

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In this work, a new approach to vulcanize commercial poly(vinyl chloride) (PVC) at room temperature and in a relatively short time (4 h) by using elemental sulfur and an initiator such as Na2S.9H2O is reported. The obtained crosslinked polymer contains polysulfide linkages that facilitate recycling/self‐healing through dynamic S–S linkages. It is shown that PVC‐polysulfide networks could be reprocessed at 180 °C for three times. The thermal and spectral characterizations of the polymers before and after recycling are performed via FT‐IR, DSC, and TGA analyses. The potential use of the sulfur rich PVC‐polysulfide system as cathode material for Li‐S battery application is also investigated and the first discharge capacity is found to be around 610 mAh g−1 that later faded rapidly.

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Crosslinking of plasticized PVC used in coated fabrics

Cited by 6 publications

References 37 publications

Thermal characteristics and temperature profile changes of structurally different polyethylenes with peroxide modifications

Thermal characteristics and temperature profile changes of structurally different polyethylenes with peroxide modifications

Preparation and Properties of a Lightweight, High-Strength, and Heat-Resistant Rigid Cross-Linked PVC Foam

Self‐Healable and Recyclable Sulfur Rich Poly(vinyl chloride) by S–S Dynamic Bonding

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