Effects of the Addition of Amino-Terminated Highly Branched Polyurea on Curing Properties of Phenol-Formaldehyde Resin
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Synthesis of HBP-NH2
2.3. Synthesis of PF Resin and Modified PF Resins
2.4. Measurements of the Basic Properties of the Resins
2.5. Gel Time Determination
2.6. Gel Permeation Chromatography (GPC)
2.7. Differential Scanning Calorimetry (DSC)
2.8. Dynamic Thermomechanical Analysis (DMA)
2.9. 13C Nuclear Magnetic Resonance (13C-NMR)
2.10. Preparation of Three-Layer Plywood Panels and Bonding Performance Tests
3. Results and Discussion
3.1. The Basic Properties of PF and HBP-NH2 Modified PF Resins
3.2. GPC Analysis of PF Resins
3.3. Bonding Strength of Series PF Resins
3.4. DSC Analysis
3.5. DMA Analysis
3.6. 13C-NMR Analysis of PF Resins
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Resin | Solid Content (%) | Viscosity (MPa·s) | Storage Period (Days) | Gel Time at 110 °C (s) | Gel Time at 130 °C (s) |
---|---|---|---|---|---|
PF | 46.19 (±0.21) | 414 (±5) | <60 | 592 (±21) | 445 (±05) |
PFA1 | 46.60 (±0.15) | 426 (±6) | >60 | 584 (±20) | 367 (±10) |
PFA3 | 46.97 (±0.23) | 446 (±8) | >60 | 497 (±18) | 364 (±08) |
PFA5 | 46.85 (±0.19) | 533 (±3) | >60 | 481 (±24) | 358 (±10) |
PFA7 | 46.16 (±0.17) | 669 (±1) | >60 | 446 (±17) | 347 (±11) |
PFA9 | 44.99 (±0.26) | 835 (±4) | >60 | 440 (±21) | 383 (±19) |
PFA11 | 44.89 (±0.15) | 994 (±5) | >60 | 472 (±18) | 403 (±17) |
PFB1 | 46.06 (±0.20) | 469 (±3) | >60 | 588 (±16) | 377 (±18) |
PFB3 | 45.85 (±0.22) | 492 (±2) | >60 | 458 (±19) | 373 (±11) |
PFB5 | 45.64 (±0.19) | 575 (±2) | >60 | 447 (±15) | 311 (±10) |
PFB7 | 46.25 (±0.18) | 780 (±4) | >60 | 450 (±20) | 343 (±17) |
PFB9 | 46.63 (±0.20) | 1037 (±7) | >60 | 468 (±19) | 321 (±15) |
PFB11 | 47.71 (±0.16) | 1209 (±2) | >60 | 448 (±20) | 304 (±17) |
PFC1 | 46.90 (±0.14) | 268 (±3) | >60 | 580 (±18) | 335 (±10) |
PFC3 | 46.10 (±0.18) | 283 (±2) | >60 | 404 (±14) | 219 (±08) |
PFC5 | 46.40 (±0.15) | 365 (±2) | >60 | 401 (±12) | 226 (±08) |
PFC7 | 46.66 (±0.23) | 513 (±1) | >60 | 460 (±20) | 340 (±05) |
PFC9 | 47.82 (±0.12) | 816 (±5) | >60 | 456 (±19) | 328 (±14) |
PFC11 | 46.74 (±0.20) | 877 (±6) | >60 | 480 (±16) | 332 (±15) |
Resin | Mn | Mw | PDI |
---|---|---|---|
PF | 11,918 | 18,005 | 1.51 |
PFA5 | 12,167 | 20,817 | 1.71 |
PFB5 | 13,459 | 21,832 | 1.62 |
PFC5 | 15,012 | 23,821 | 1.59 |
Structure | Chemical Shifts (ppm) | Integral Area Share (%) | |
---|---|---|---|
PF | PFC5 | ||
o,o-Ph-CH2-Ph | 29–31 | 88.38 | 86.73 |
o,p-Ph-CH2-Ph | 34–36 | 6.05 | 6.20 |
p,p-Ph-CH2-Ph o-Ph-CH2-NHCO- | 40–41 | 5.57 | 7.01 |
p-Ph-CH2-NHCO- | 45–46 | 0.00 | 0.06 |
Total | 100 | 100 |
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Lian, S.; Lin, H.; Zhang, W.; Lei, H.; Cao, M.; Mao, J.; Li, T.; Chen, S.; Yang, L. Effects of the Addition of Amino-Terminated Highly Branched Polyurea on Curing Properties of Phenol-Formaldehyde Resin. Materials 2023, 16, 3620. https://doi.org/10.3390/ma16103620
Lian S, Lin H, Zhang W, Lei H, Cao M, Mao J, Li T, Chen S, Yang L. Effects of the Addition of Amino-Terminated Highly Branched Polyurea on Curing Properties of Phenol-Formaldehyde Resin. Materials. 2023; 16(10):3620. https://doi.org/10.3390/ma16103620
Chicago/Turabian StyleLian, Shiguan, Huali Lin, Wenbin Zhang, Hong Lei, Ming Cao, Jianrong Mao, Taohong Li, Shi Chen, and Long Yang. 2023. "Effects of the Addition of Amino-Terminated Highly Branched Polyurea on Curing Properties of Phenol-Formaldehyde Resin" Materials 16, no. 10: 3620. https://doi.org/10.3390/ma16103620