Toughening modification of unsaturated polyester resin using HDI trimer

Duan, Huajun; Zhang, Lianmeng; Wang, Jun; Yang, Xiaoli; Wang, Xiang

doi:10.1007/s11595-009-4627-2

Cited by 11 publications

(5 citation statements)

References 10 publications

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“…The weight loss of microspheres in the range of 400–500°C also increases with the increase content of HDI trimer in spheres, indicating more HDI trimer structure in the PU nano spheres. Because the HDI trimer has a functionality of 3 and the crosslinking degree of PU nano spheres increases with the increasing amount of HDI trimer in the spheres, which causes the thermal stability of the spheres enhanced 23,24 …”

Section: Resultsmentioning

confidence: 99%

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Polyurethane‐based cross‐linked nano spheres and their application in toughening epoxy resin

Shi,

Li,

Song

et al. 2024

J of Applied Polymer Sci

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Toughening thermo‐setting resins with both high impact strength and tensile strength is a challenging issue. In this study, a novel cross‐linked polyurethane nano spheres for toughening epoxy resin were prepared by self‐emulsification method with hexamethylene diisocyanate trimer (HDI trimer) and diethylene triamine (DETA) as the crosslinkers. The structure, morphology and particle size of cross‐linked polyurethane nano spheres were investigated by infrared spectroscopy, laser particle size analyzer and scanning electron microscopy. Results showed that the prepared cross‐linked polyurethane nano spheres showed spherical shape and had the size in the range from 40 to 258 nm. The application of cross‐linked polyurethane nano spheres in toughing epoxy resin was investigated. The results showed that cross‐linked polyurethane nano spheres can be uniformly dispersed in epoxy resin and no obvious aggregation phenomenon was observed. And the tensile strength and impact strength of epoxy resin can be increased simultaneously when the cross‐linked polyurethane nano spheres were used in toughening epoxy resin. With the increase of the amount of polyurethane nano spheres in epoxy resin, both the tensile strength and impact strength of epoxy resin had the trend of first increase and then decrease. The amount of HDI trimer in the microspheres had a great impact on their toughening effect on epoxy resin. When the cross‐linked polyurethane nano spheres contained HDI trimer content of 12 wt% and the amount of the nano spheres in epoxy resin was 8 wt%, the impact strength of the epoxy resin can reach as high as 23 kJ/m2, which was 4.33 times that of pristine epoxy resin. And the tensile strength of toughened epoxy resin was 50.7 MPa, which was at same level of that of pristine epoxy resin. The results of this study indicate that the cross‐linked polyurethane nano spheres have a great potential in toughening thermo setting resins, such as epoxy resin.

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Section: Resultsmentioning

confidence: 99%

“…Because the HDI trimer has a functionality of 3 and the crosslinking degree of PU nano spheres increases with the increasing amount of HDI trimer in the spheres, which causes the thermal stability of the spheres enhanced. 23,24…”

Section: Thermal Stability Of Cross-linked Pu Nano Spheresmentioning

confidence: 99%

Polyurethane‐based cross‐linked nano spheres and their application in toughening epoxy resin

Shi,

Li,

Song

et al. 2024

J of Applied Polymer Sci

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“…43 The versatile polyurethane chemistry provides these products with outstanding properties of compatibility with different components and hot melt adhesives and excellent thermal and mechanical properties. 44,45 HDIP is one of the most important isocyanate-terminated polyurethane prepolymer, and it was widely used in preparing high-performance coatings, sports devices, and household goods. 46 According to the supplier of HDIT, it should be a mixture of predominately urethane oligomers, such as HDI dimer (HDID), HDI trimer (HDIT), linear HDI multimer, and annular HDI multimer, and so on.…”

Section: Reaction Mechanismmentioning

confidence: 99%

Reactive extrusion of partially crosslinked poly (butylene succinate) via novel vane extruder: thermal, mechanical and rheological properties

Huang

2016

Plastics, Rubber and Composites

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In this study, crosslinked poly (butylene succinate) (PBS) was prepared successfully by the reactions of the end hydroxyl groups of PBS with the isocyanate groups of hexamethylene diisocyanate prepolymer (HDIP) using a vane extruder (VE) followed by compression moulding. Torque and gel permeation chromatography showed that the PBS was successfully corsslinked by HDIP. The effects of varied HDIP on properties such as mechanical, thermal properties, and capillary rheological behaviours were also evaluated. The results indicated that HDIP crosslinked PBS with high efficiency. The gel fraction of the crosslinked PBS increased to 57% with the 1.5 wt-% HDIP loading. Differential scanning calorimetry revealed that the cross-link points in the crosslinked samples act as crystal nuclei and the crystallisation temperature increase. Dynamic mechanical analysis revealed that the glass transition temperature (Tg) increased with increase in gel fraction. This may be caused by the reduced molecular chain mobility for corsslinked samples. The capillary rheological properties showed that all samples exhibit non-Newtonian and shear thinning characteristics in the range of applied shear rates, and the apparent viscosity increased with the HDIP content. What's more, the crosslinked PBS also showed improved mechanical properties and thermal stability.

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“…Costa et al studied a new type of unsaturated polyester resin based on soybean oil and coconut oil, which has considerable thermal stability. Other researchers have used different raw materials to enhance the mechanical properties of unsaturated polyester resins, such as hexamethylene diisocyanate (HDI) trimer, bismaleimide, and isophorone diisocyanate (IPDI) . Some scholars have also injected synthesized epoxy oligomers into wood to prepare wood–plastic composites .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Modification of Fast-Growing Wood: Application and Evaluation of Castor Oil-Based Unsaturated Polyester Resin

Xu,

Ju,

Tang

et al. 2023

ACS Omega

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A type of multifunctional maleic acid ester monomer (COEGMA) was synthesized using castor oil as raw material, and green wood–plastic composites were prepared by chemically impregnating and curing the monomer into wood. The structure of the synthesized products at various stages was determined by FT-IR spectroscopy, 1H NMR, and GPC, and the curing experimental conditions were optimized. The results show that the water absorption of wood–plastic composites treated with COEGMA is reduced from the original 167.3% to less than 20%. The compressive strength has increased from 35.7 to 86.1 MPa, and the thermal stability has also increased by 40 °C. This research provides promising prospects for the development of environmentally friendly wood–plastic composites, especially as fossil resources become scarce and environmental pollution becomes more severe.

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Toughening modification of unsaturated polyester resin using HDI trimer

Cited by 11 publications

References 10 publications

Polyurethane‐based cross‐linked nano spheres and their application in toughening epoxy resin

Polyurethane‐based cross‐linked nano spheres and their application in toughening epoxy resin

Reactive extrusion of partially crosslinked poly (butylene succinate) via novel vane extruder: thermal, mechanical and rheological properties

Enhanced Modification of Fast-Growing Wood: Application and Evaluation of Castor Oil-Based Unsaturated Polyester Resin

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