Thermal aging and accelerated weathering of <scp>PVC/MMT</scp> nanocomposites: Structural and morphological studies

Pagacz, Joanna; Chrzanowski, M.; Krucińska, Izabella; Pielichowski, Krzysztof

doi:10.1002/app.42090

Cited by 23 publications

(17 citation statements)

References 50 publications

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“…During UV irradiation for 500–1000 h, the reduction rate of the yield strength slowed down because of the crosslinking reaction of free radicals. As the crosslinking density increased, the orientation stretching of the PVC molecular chain became more difficult . In addition, the yield strength retention rate of the PVC–PBI‐ g ‐CMBeIm blend films was higher than that of the pure PVC, and it increased with the increase in the PBI‐ g ‐CMBeIm content.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of chloromethyl benzimidazole grafted polybenzimidazole with enhanced UV absorption and its effect as a stabilizer on the ultraviolet‐aging behaviors of poly(vinyl chloride) films

Zhang

et al. 2019

J of Applied Polymer Sci

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Poly(vinyl chloride) (PVC) is particularly susceptible to UV damage, and its durability can be reduced substantially when it is exposed to outdoor environments. In this study, high-molecular-weight polybenzimidazole (PBI) was synthesized and then grafted with 2-chloromethyl benzimidazole. The polybenzimidazole grafted with 2-chloromethyl benzimidazole (PBI-g-CMBeIm) could absorb over 99% of UV light in the region 220-420 nm. Then, PVC-PBI-g-CMBeIm blend films were prepared by a solution-casting method, and the effects of the PBI-g-CMBeIm content and UV-irradiation time on the properties of these films were investigated. The results show that the benzimidazole moieties incorporated into the macromolecular chain of PBI provided additional conjugation units, and this allowed the films to have a stronger UV absorption and broader λ range. The yield strength of the PVC-PBI-g-CMBeIm blend films irradiated for 1000 h ranged from 16.5 to 27.7 MPa; this increased 3.2-14.4 MPa compared with that of the pure PVC. The strength retention rate of the pure PVC was 28.8%, whereas that of the PVC-PBI-g-CMBeIm blend films was in the range 34.1-55.2%. The addition of PBI-g-CMBeIm also effectively increased the thermal degradation temperature of the blend films and slowed down their thermal degradation rate.

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Section: Resultsmentioning

confidence: 99%

Synthesis of chloromethyl benzimidazole grafted polybenzimidazole with enhanced UV absorption and its effect as a stabilizer on the ultraviolet‐aging behaviors of poly(vinyl chloride) films

Zhang

et al. 2019

J of Applied Polymer Sci

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“…Moreover, the addition of certain inorganic fillers, such as calcium carbonate, metal particles, montmorillonite, mica, and so forth leads to an efficient thermal stabilization of the polymer, while providing composite materials with higher wear resistance, stiffness and hardness values at lower material costs than in the case of using PVC alone. An improvement in the thermal‐, sound‐insulating, and mechanical properties of the material (flexural strength, impact resistance) was also achieved through mixing PVC with “green” natural cellulose fibers and wood, providing higher performance/weight ratios in comparison with inorganic fillers …”

Section: Introductionmentioning

confidence: 99%

Calcium carbonate and wood reinforced hybrid PVC composites

Croitoru

Spirchez

Cristea

et al. 2018

J of Applied Polymer Sci

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In this article, poly(vinyl chloride) (PVC) sandwich-structured hybrid composites with amorphous calcium carbonate and wood-filled cores were obtained by compression molding. It has been determined that wood addition up to a weight ratio of 33% reported to the total filler amount is beneficial in improving both the inter-filler and filler-matrix interfacial adhesion, which alongside with the promoting of the amorphous PVC matrix crystallization is responsible for an increase up to 34% in the flexural strength of the composites, compared to unfilled PVC. The hybrid filled composites present up to 35% lower friction coefficients and up to 20% higher Brinell hardness values than the composites filled with calcium carbonate alone. Subsequently, wood addition determines an increase in the oxidation onset temperature for PVC and an increase with up to 20% in the sound and thermal-insulative properties of the composites, compared to unfilled PVC. The dominating dispersive part of the composites surface energy aids in improving the mass and dimensional stability of the assembly to both water and dilute hydrochloric acid aqueous solutions. V C 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46317.

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“…Various inorganic fillers have been extensively applied in plastics and rubber. Many properties such as toughness , tensile strength , processability , conductivity , and thermal resistance can be influenced by the incorporation of inorganic fillers. The development of organic–inorganic hybrid materials, often achieved by grafting different monomers on microsized and nanosized particles or adding modified inorganic particles into polymer materials, is aimed at producing composite materials with excellent performance .…”

Section: Introductionmentioning

confidence: 99%

The surface modification of diatomite, thermal, and mechanical properties of poly(vinyl chloride)/diatomite composites

Bai

et al. 2018

Vinyl Additive Technology

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Pristine diatomite was first purified by acid treatment and then modified with γ‐methacryloxy propyl trimethoxysilane molecule (KH570) to introduce hydrophobic chains on the surface of acid‐treated diatomite. Fourier‐transform infrared spectroscopy and thermogravimetric analysis (TGA) indicated that the silane coupling agent (KH570) was successfully grafted on the diatomite through covalent bonding. The digital photos showed that the silanization process changed the surface property of the diatomite. The poly(vinyl chloride) (PVC)/pristine diatomite and PVC/modified diatomite composites were prepared via two‐roll mill. The thermal stability and mechanical properties of PVC composites were investigated by TGA, mechanical properties tests, and dynamic mechanical analysis. The results showed that the thermal stability of the composites improved and maximum weight loss temperature (Tmax) of the PVC composite with 1 phr modified diatomite was about 20°C higher than that of PVC composite without diatomite. The PVC/modified diatomite composites exhibited better mechanical properties owing to the stronger interfacial interaction between PVC matrix and modified diatomite. But the impact strength reduced sharply when the addition of diatomite was more than 1 phr. The reason of the phenomenon is that the diatomite plays the role of defects in PVC and it works against the absorption of impact strength energy. It was proved by the results of scanning electron microscopy. J. VINYL ADDIT. TECHNOL., 25:E39–E47, 2019. © 2018 Society of Plastics Engineers

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Thermal aging and accelerated weathering of PVC/MMT nanocomposites: Structural and morphological studies

Cited by 23 publications

References 50 publications

Synthesis of chloromethyl benzimidazole grafted polybenzimidazole with enhanced UV absorption and its effect as a stabilizer on the ultraviolet‐aging behaviors of poly(vinyl chloride) films

Synthesis of chloromethyl benzimidazole grafted polybenzimidazole with enhanced UV absorption and its effect as a stabilizer on the ultraviolet‐aging behaviors of poly(vinyl chloride) films

Calcium carbonate and wood reinforced hybrid PVC composites

The surface modification of diatomite, thermal, and mechanical properties of poly(vinyl chloride)/diatomite composites

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