Preparation and chemical reactions of rigid cross‐linked poly(vinyl chloride) foams modified by epoxy compounds

Jiang, Zhiwei; Yao, Kun; Du, Zhonghui; Xue, Jian; Tang, Tao; Liu, Wenbin

doi:10.1002/app.40567

Cited by 12 publications

(5 citation statements)

References 31 publications

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“…RPVC foams are usually prepared by introducing crosslinking agents to form interpenetrating networks (IPN) 4 . However, the high rigidity of the PVC chains restrains the chain movement, thus deteriorates the toughness of RPVC foams and makes the foams fragile 5 . Fire safety is another concern for polymeric foam materials applied in building occasions.…”

Section: Introductionmentioning

confidence: 99%

Construction of a copper hydroxystannate functionalized graphene oxide for rigid polyvinyl chloride foam toward improved fire safety

Huang

Wang

2023

Polymers for Advanced Techs

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A copper hydroxystannate (CHS) functionalized graphene oxide (GO) (CHS@GO) was feasibly prepared through an in‐situ method, and well characterized by TEM, XRD, FTIR and XPS. Rigid poly vinyl chloride (RPVC) foams containing CHS@GO were prepared by utilizing methyl hexahydrophthalic anhydride and isocyanate as coupling agents, azodiisobutyronitrile and azodicarbonamide as blowing agents. The fire safety, mechanical properties and thermal decomposition behavior of the RPVC foams were studied. The RPVC foam containing 2 wt% CHS@GO (RPVC/2CHS@GO) achieved a limiting oxygen index (LOI) of 35.5% and a V0 rating in the UL‐94 tests. The cone calorimetric tests (CCT) results demonstrated the peak heat release rate (pHRR) and total heat release (THR) of RPVC/2CHS@GO were reduced by 40.6% and 36.8%, respectively, compared with those of pure RPVC foam (pure RPVC). The compressive strength and flexural strength of RPVC/2CHS@GO were increased by 47.3% and 34.6%, respectively, in contrast with those of Pure RPVC. The thermogravimetry results showed that CHS@GO endowed the RPVC foams with improved char residue.

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Section: Introductionmentioning

confidence: 99%

Construction of a copper hydroxystannate functionalized graphene oxide for rigid polyvinyl chloride foam toward improved fire safety

Huang

Wang

2023

Polymers for Advanced Techs

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“…The cross-linked net of isocyanate and anhydride constitutes a semi-interpenetrating network structure with a PVC matrix when the foam is forming [13]. The third method uses isocyanate and epoxy resin (E51) in the absence of anhydride composition to form a semi-interpenetrating network structure with a matrix resin PVC [14,15].…”

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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“…The incorporation of acrylic polymers in PVC behaves as equivalent to rubber toughening of glassy polymers [2] . In this context, poly (ethyl acrylate) (PEA) has been used as an effective polymeric modifier which influences the mechanical properties of PVC by raising its toughness and elongation without compromising much on the modulus and ultimate tensile strength [3] . The PVCpoly (ethyl acrylate) blended polymers also exert a modifying influence on the thermal and morphological properties which has already been reported in literature [4] .…”

Section: Introductionmentioning

confidence: 99%

Application of the Electro-Fenton process to the degradation of Malathion from a synthetic effluent

2022

JCBSC

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Polyvinyl chloride (PVC) is one of the polymers which play a large role in sustainable development. However, the problems of poor impact strength, difficult processibility, and poor thermal stability are some of the inherent features which are associated with the most widely used polymer PVC. To overcome these limitations, polymeric or non-polymeric modifiers may be used which are often referred to as impact modifiers or processing aids. However, by the usage of a non-polymeric modifier, one of the properties of the polymer is enhanced but it induces deterioration in the other properties of the same. So, by incorporating polyethyl acrylate (PEA) as the polymeric modifier in PVC, it has been observed that the mechanical properties of the latter are largely modified by increased elongation at break and toughness. However, the mechanical parameters of modulus and ultimate tensile strength are not improved by the influence of PEA. With this basic observation, the present study aims at improving the properties of PVC even further in terms of modulus and ultimate tensile strength by incorporating nano calcium carbonate (nano CaCO3) within it and estimate the dynamics of the incorporated system over a range of added nanofiller.

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Preparation and chemical reactions of rigid cross‐linked poly(vinyl chloride) foams modified by epoxy compounds

Cited by 12 publications

References 31 publications

Construction of a copper hydroxystannate functionalized graphene oxide for rigid polyvinyl chloride foam toward improved fire safety

Construction of a copper hydroxystannate functionalized graphene oxide for rigid polyvinyl chloride foam toward improved fire safety

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

Application of the Electro-Fenton process to the degradation of Malathion from a synthetic effluent

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