Preparation and Performance Research on Phenolic Insulation Foam Used Low-Temperature Foaming Technology

Zhuang, Xiao; Li, Shou Hai; Feng, Yu; Zhang, Wei; Xu, Yu Zhi; Wang, Chun Peng; Chu, Fu Xiang

doi:10.4028/www.scientific.net/amr.250-253.450

Cited by 6 publications

(3 citation statements)

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“…Phenolic resin (PF) is the main raw material used in the production of phenolic foam. Its use level is about 50%–90% of the total weight of the phenolic foam [8,9]. The molecular structure of the phenolic resin determines the brittleness of the phenolic foam because there are three active sites on the benzene ring of phenol, which are located on the ortho-position and para-position of the phenolic hydroxyl group.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of the 3-pentadecyl-phenol In Situ Modified Foamable Phenolic Resin

Tang

et al. 2018

Polymers

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In this present study, 3-pentadecyl-phenol was selected as a modifier to prepare a foamable phenolic resin with excellent performance, which was successfully prepared by in situ modification. Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (1H NMR, 13C NMR) were used to test and characterize the molecular structure of the modified resin. The results showed that 3-pentadecyl-phenol successfully modified the molecular structure of phenolic resin with a reduction in the resin gel time. The effect of changing the added amount of 3-pentadecyl-phenol on the mechanical properties, microstructure, and flame retardancy of the modified foam was investigated. The results showed that when the amount of added 3-pentadecyl-phenol was 15% of the total amount of phenol, this resulted in the best toughness of the modified foam, which could be increased to 300% compared to the bending deflection of the unmodified phenolic foam. The cell structure showed that the modified phenolic foam formed a more regular and dense network structure and the closed cell ratio was high. Furthermore, the compressive strength, bending strength, and limited oxygen index were improved, while the water absorption rate was lowered. However, the foam density could be kept below 40 mg/cm3, which does not affect the load.

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Section: Introductionmentioning

confidence: 99%

Preparation and Properties of the 3-pentadecyl-phenol In Situ Modified Foamable Phenolic Resin

Tang

et al. 2018

Polymers

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“…Phenolic foams (PFs) have been mainly used as insulators in buildings due to their high thermal stability, low smoke density, and flame retardance. , However, their low mechanical strength compared to that of other foams, such as polystyrene, polyurethane, and melamine, limits their range of applications . Several efforts have been made over the years to improve these properties, either through the incorporation of additives or by chemical modification of the phenolic resin matrix .…”

Section: Introductionmentioning

confidence: 99%

Comparison of Toughening Effects of Various Additives on Phenolic Foam

Sarika,

Nancarrow,

Ibrahim

2024

ACS Omega

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Phenolic foams (PFs) are considered excellent insulation materials owing to their flame retardancy and low thermal conductivity. However, their mechanical properties often lag behind those of other polymeric insulation materials. To fully exploit their properties and broaden end-use applications, the mechanical properties of PFs must be enhanced. In this study, various modifications were introduced into the PF matrix with the aim of enhancing its properties. The toughening effects of four additives: urea (U), nano clay (NC), sodium silicate (SS), and lignin (Li) were studied and compared. Changes that occurred in the density, cell morphology, thermal conductivity, compressive strength, and thermal stability after the addition of these fillers were analyzed. Both compressive strength and thermal stability increased with the inclusion of all additives, and the SS-toughened foam shows the biggest improvement. Li and NC addition resulted in a 34% improvement in compressive strength, while SS and U addition displayed increases of 52 and 11%, respectively. SStoughened PF shows greater improvements in all of the important properties compared with those of the other toughened foams. Several PFs were prepared by changing the SS concentration to optimize the formulation, which yielded improvements in properties. The effects of SS concentration on density, thermal conductivity, and compressive strength were studied. The formulation with 0.37% sodium silicate concentration (PF-SS1) shows a 15% improvement in mechanical properties.

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“…Phenolic resin is the main raw material used in the production of phenolic foam. Its use level is about 50-90% of the total weight of the phenolic foam [8,9]. The molecular structure of the phenolic resin determines the brittleness of the phenolic foam because there are three active sites on the benzene ring of phenol, which are located on the ortho-position and para-position of the phenolic hydroxyl group.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of 3-Pentadecyl-phenol In-Situ Modified Foamable Phenolic Resin

Ge¹,

Tang²,

Yu³

et al. 2018

Preprint

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In this present study, 3-pentadecyl-phenol was selected as a modifier to prepare a foamable phenolic resin with excellent performance, which was successfully prepared by in-situ modification. Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (1H NMR, 13C-NMR) were used to test and characterize the molecular structure of the modified resin. The results showed that 3-pentadecyl-phenol successfully modified the molecular structure of phenolic resin with a reduction in resin gel time. The effect of changing the added amount of 3-pentadecyl-phenol on the mechanical properties, microstructure and flame retardancy of the modified foam was investigated. The results showed that when the amount of added 3-pentadecyl-phenol was 15% of the total amount of phenol, this resulted in the best toughness of the modified foam, which could be increased to 300% compared to the bending deflection of the unmodified phenolic foam. The cell structure showed that the modified phenolic foam formed a more regular and dense network structure and the closed cell ratio was high. Furthermore, the compressive strength, bending strength, and limited oxygen index were improved, while the water absorption rate was lowered. However, the foam density could be kept below 40 mg/cm3, which does not affect the load.

show abstract

Preparation and Performance Research on Phenolic Insulation Foam Used Low-Temperature Foaming Technology

Cited by 6 publications

References 0 publications

Preparation and Properties of the 3-pentadecyl-phenol In Situ Modified Foamable Phenolic Resin

Preparation and Properties of the 3-pentadecyl-phenol In Situ Modified Foamable Phenolic Resin

Comparison of Toughening Effects of Various Additives on Phenolic Foam

Preparation and Properties of 3-Pentadecyl-phenol In-Situ Modified Foamable Phenolic Resin

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