Mild-thermal fabrication and phase conformation of chopped glass fiber-reinforced low-density unsaturated polyester resin with NH4HCO3

Guo, B.; Wang, Xiaojun; Wang, Ruru; Ma, Yuecheng

doi:10.1007/s13726-018-0670-1

Cited by 5 publications

(20 citation statements)

References 23 publications

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“…It is concluded that the most suitable gel time was 25.3-34.2 min corresponding to 1.80 phr initiator. [3,22]. Values of Y and T were determined in terms of preliminary experiments above, which Y value was no more than 30.00 phr and T was in range from 72.0°C to 80.0°C.…”

Section: Resultsmentioning

confidence: 99%

“…Orthogonal experiment is a kind of multifactor and multilevel test design method, which can substantially reduce the number of tests under the condition of ensuring the representativeness of the test [23,24]. In this study, an orthogonal experiment of L 25 (5 3 ) (where L is the code name, 25 is the number of test, 3 is the number of different factors, and 5 is the level number for one factor [3,5]) was designed for the preparation of CaCO 3 /LDUPR. X, Y, and T were three different factors.…”

Section: Resultsmentioning

confidence: 99%

“…Finer grain CaCO 3 , more evident foaming and mechanical enhancement of CaCO 3 /LDUPR sample. On the other hand, LDUPR sample, which was obtained with the As for the chopped glass fiber reinforced low-density unsaturated polyester resin (CGR-LDUPR), the apparent density was 0.63±0.02 g·cm −3 , the compressive strength was 24.29±0.73 MPa, and the specific compressive strength was 38.56±1.02 MPa·g −1 ·cm 3 [3]. It is obviously that the mechanical enhancement of the fine particle CaCO 3 was the same as that of CGR-LDUPR.…”

Section: Resultsmentioning

confidence: 99%

“…With increasing demand of economic efficiency and environmental protection, low cost and high specific strength product has received attention lately as for unsaturated polyester resin. In the case of the tendency, lowdensity unsaturated polyester resin (LDUPR) and its composite materials, which present less resin cost, low apparent density and high specific compressive strength, have been the growing highlight of studies for UPR composite materials [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…At high temperature, Zhu et al explored the LDUPR preparation with the presence of sodium carbonhydrate/azodicarbonamide mixture [6]. Novel mild-thermal fabrication of chopped glass fiber/ LDUPR composite via NH 4 HCO 3 was presented by Guo et al [3].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Wang

2020

Mater. Res. Express

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Incorporation of different fine grain calcium carbonate into CaCO 3 /low-density unsaturated polyester resin (LDUPR) composites was studied and evident mechanical enhancement of CaCO 3 on composites was investigated. Preliminary experiment results indicated that proper content of CaCO 3 was less than 30.00 phr (parts per hundreds of resin), suitable preparation temperature range was from 72.0°C to 80.0°C, and initiator content was 1.80 phr. Optimal preparation conditions of CaCO 3 /LDUPR samples were obtained with the presence of 25.00 phr CaCO 3 and 2.50 phr NH 4 HCO 3 at 76.0°C based on preliminary experiments. The lowest apparent density of A-CaCO 3 /LDUPR composite was 0.53±0.02 g·cm −3 with a compressive strength of 20.27±0.51 MPa·g −1 ·cm 3 , and the highest specific compressive strength of the sample was 38.25±1.43 MPa·g −1 ·cm 3 . It is attributed to the hindrance to cross-linking between unsaturated polyester and styrene, and to the decrease of exothermic heat of the polymerization, which was caused by the existence of CaCO 3 . Unusual matrix microstructure with regular ripples and dimples formed by CaCO 3 , and the particular mechanical enhancement of regular ripples and dimples in composites were explored. 'CaCO 3 reefs' concept, reefs-induced ripples, dimples of streams flowing, and resolution of external force with major force further being consumed models comprised the regulated mechanical enhancement of CaCO 3 in CaCO 3 /LDUPR composites. This particular polymerization retarding and mechanical strengthening were obvious for the finest grain CaCO

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Wang

2020

Mater. Res. Express

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Synergistic action of initiator and accelerator on curing thermodynamics and kinetics of chopped carbon fiber-reinforced low-density unsaturated polyester resin with rapid polymerization

Chen

Wang²,

Zhang³

et al. 2022

J Therm Anal Calorim

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High Mechanic Enhancement of Chopped Carbon Fiber Reinforced-Low-Density Unsaturated Polyester Resin Composite at Low Preparation Temperature with Facile Polymerization

Jian

Wang

2021

Materials

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Chopped carbon fiber-reinforced low-density unsaturated polyester resin (CCFR-LDUPR) composite materials with light weight and high mechanical properties were prepared at low temperature and under the synergistic action of methyl ethyl ketone peroxide (MEKP-II) and cobalt naphthenate. Optimal preparation conditions were obtained through an orthogonal experiment, which were preparation temperature at 58.0 °C, 2.00 parts per hundred of resin (phr) of NH4HCO3, 4.00 phr of chopped carbon fibers (CCFs) in a length of 6.0 mm, 1.25 phr of initiator and 0.08 phr of cobalt naphthenate. CCFR-LDUPR composite sample presented its optimal properties for which the density (ρ) was 0.58 ± 0.02 g·cm−3 and the specific compressive strength (Ps) was 53.56 ± 0.83 MPa·g−1·cm3, which is 38.9% higher than that of chopped glass fiber-reinforced low-density unsaturated polyester resin (CGFR-LDUPR) composite materials. Synergistic effects of initiator and accelerator accelerated the specific polymerization of resin in facile preparation at low temperature. Unique “dimples”, “plate microstructure” and “surface defect” fabricated the specific microstructure of the matrix of CCFR-LDUPR composite samples, which was different from that of cured unsaturated polyester resin (UPR) with “body defect” or that of CGFR-LDUPR with coexistence of “surface defect” and “body defect”.

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Mild-thermal fabrication and phase conformation of chopped glass fiber-reinforced low-density unsaturated polyester resin with NH4HCO3

Cited by 5 publications

References 23 publications

Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Synergistic action of initiator and accelerator on curing thermodynamics and kinetics of chopped carbon fiber-reinforced low-density unsaturated polyester resin with rapid polymerization

High Mechanic Enhancement of Chopped Carbon Fiber Reinforced-Low-Density Unsaturated Polyester Resin Composite at Low Preparation Temperature with Facile Polymerization

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Mild-thermal fabrication and phase conformation of chopped glass fiber-reinforced low-density unsaturated polyester resin with NH4HCO3

Cited by 5 publications

References 23 publications

Mechanical enhancement of ripples and dimples in CaCO3/low-density unsaturated polyester resin composites

Mechanical enhancement of ripples and dimples in CaCO3/low-density unsaturated polyester resin composites

Synergistic action of initiator and accelerator on curing thermodynamics and kinetics of chopped carbon fiber-reinforced low-density unsaturated polyester resin with rapid polymerization

High Mechanic Enhancement of Chopped Carbon Fiber Reinforced-Low-Density Unsaturated Polyester Resin Composite at Low Preparation Temperature with Facile Polymerization

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Product

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Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites