Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (3): 572.doi: 10.7503/cjcu20190454
• Polymer Chemistry • Previous Articles Next Articles
SHENG Yeming,CHENG Bo,LU Xun
Received:
2019-08-14
Online:
2020-01-09
Published:
2019-12-31
Contact:
Xun LU
Supported by:
CLC Number:
TrendMD:
SHENG Yeming,CHENG Bo,LU Xun. Research on Self-healing Polypolyurethane Elastomer Based on Multiple Reversible Action [J]. Chem. J. Chinese Universities, 2020, 41(3): 572.
Sample | n(IPDI)/mol | n(PBA-2000)/mol | n(DTDA)/mol | n(MDA)/mol | n(BA)/mol | n(TMP)/mol |
---|---|---|---|---|---|---|
IP-DTDA-BA | 0.02 | 0.01 | 0.0048 | 0 | 0.0048 | 0 |
IP-DTDA-TMP | 0.02 | 0.01 | 0.0048 | 0 | 0 | 0.0048 |
IP-MDA-BA | 0.02 | 0.01 | 0 | 0.0048 | 0.0048 | 0 |
IP-MDA-TMP | 0.02 | 0.01 | 0 | 0.0048 | 0 | 0.0048 |
Sample | n(IPDI)/mol | n(PBA-2000)/mol | n(DTDA)/mol | n(MDA)/mol | n(BA)/mol | n(TMP)/mol |
---|---|---|---|---|---|---|
IP-DTDA-BA | 0.02 | 0.01 | 0.0048 | 0 | 0.0048 | 0 |
IP-DTDA-TMP | 0.02 | 0.01 | 0.0048 | 0 | 0 | 0.0048 |
IP-MDA-BA | 0.02 | 0.01 | 0 | 0.0048 | 0.0048 | 0 |
IP-MDA-TMP | 0.02 | 0.01 | 0 | 0.0048 | 0 | 0.0048 |
Fig.1 FTIR spectra of prepolymerization reaction(A) and cross-linking reaction and extension reaction(B) (A) a. PBA-2000; b. IPDI; c. IP-PBA. (B) a. BA; b. IP-PBA; c. IP-DTDA-BA.
Fig.3 Optical microscopes of different crack healing states of IP-DTDA-BA at 60 ℃ (A) Original. Healing time/h: (B) 0.5; (C) 1; (D) 2; (E) 4; (F) 6; (G) 12; (H) 24.
n(DTDA/BA)/n(IP-DTDA-BA) | n(IPDI)/mol | n(PBA-2000)/mol | n(DTDA)/mol | n(BA)/mol |
---|---|---|---|---|
0/1 | 0.02 | 0.01 | 0 | 0.008 |
0.2/0.8 | 0.02 | 0.01 | 0.0024 | 0.0064 |
0.4/0.6 | 0.02 | 0.01 | 0.0048 | 0.0048 |
0.5/0.5 | 0.02 | 0.01 | 0.006 | 0.004 |
0.6/0.4 | 0.02 | 0.01 | 0.0072 | 0.0032 |
0.8/0.2 | 0.02 | 0.01 | 0.0096 | 0.0016 |
1/0 | 0.02 | 0.01 | 0.012 | 0 |
n(DTDA/BA)/n(IP-DTDA-BA) | n(IPDI)/mol | n(PBA-2000)/mol | n(DTDA)/mol | n(BA)/mol |
---|---|---|---|---|
0/1 | 0.02 | 0.01 | 0 | 0.008 |
0.2/0.8 | 0.02 | 0.01 | 0.0024 | 0.0064 |
0.4/0.6 | 0.02 | 0.01 | 0.0048 | 0.0048 |
0.5/0.5 | 0.02 | 0.01 | 0.006 | 0.004 |
0.6/0.4 | 0.02 | 0.01 | 0.0072 | 0.0032 |
0.8/0.2 | 0.02 | 0.01 | 0.0096 | 0.0016 |
1/0 | 0.02 | 0.01 | 0.012 | 0 |
n(DTDA)/n(BA) | Original | Healed | ||
---|---|---|---|---|
Stress/MPa | Strain(%) | Stress/MPa | Strain(%) | |
0/1 | 15.8±0.6 | 1208±62 | 10.9±0.4 | 929±40 |
0.2/0.8 | 25.6±0.8 | 1354±64 | 21.3±0.6 | 1103±46 |
0.4/0.6 | 23.3±0.6 | 1177±56 | 23.2±0.6 | 950±42 |
0.5/0.5 | 17.9±0.5 | 774±36 | 17.2±0.5 | 684±36 |
0.6/0.4 | 11.4±0.3 | 819±36 | 11.3±0.3 | 766±32 |
0.8/0.2 | 10.9±0.3 | 548±22 | 10.9±0.3 | 502±20 |
1/0 | 12.6±0.3 | 786±37 | 12.5±0.3 | 782±36 |
n(DTDA)/n(BA) | Original | Healed | ||
---|---|---|---|---|
Stress/MPa | Strain(%) | Stress/MPa | Strain(%) | |
0/1 | 15.8±0.6 | 1208±62 | 10.9±0.4 | 929±40 |
0.2/0.8 | 25.6±0.8 | 1354±64 | 21.3±0.6 | 1103±46 |
0.4/0.6 | 23.3±0.6 | 1177±56 | 23.2±0.6 | 950±42 |
0.5/0.5 | 17.9±0.5 | 774±36 | 17.2±0.5 | 684±36 |
0.6/0.4 | 11.4±0.3 | 819±36 | 11.3±0.3 | 766±32 |
0.8/0.2 | 10.9±0.3 | 548±22 | 10.9±0.3 | 502±20 |
1/0 | 12.6±0.3 | 786±37 | 12.5±0.3 | 782±36 |
Healing condition | Stress/MPa | Healing efficiency(%) | Strain(%) | Strain healing efficiency(%) | Healing time/h |
---|---|---|---|---|---|
60 ℃ | 23.2±0.6 | 99 | 950±42 | 81 | 24 |
60 ℃, wetting | 23.2±0.5 | 99 | 1206±48 | 100 | 12 |
Healing condition | Stress/MPa | Healing efficiency(%) | Strain(%) | Strain healing efficiency(%) | Healing time/h |
---|---|---|---|---|---|
60 ℃ | 23.2±0.6 | 99 | 950±42 | 81 | 24 |
60 ℃, wetting | 23.2±0.5 | 99 | 1206±48 | 100 | 12 |
Fig.8 Activation energy characterization of polyurethane elastomer with different kinds of chain extender (A) DMA spectrogram; (B) E' and E″ values for IP-DTDA-BA at 60 ℃; (C) lnf-103 T-1 curve; (D) histogram ofmain transition activation energy(Ea).
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