Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (9): 1670.doi: 10.7503/cjcu20170149
• Polymer Chemistry • Previous Articles Next Articles
GU Yuanbo, HU Yanhong*, DU Lei, DENG Shifeng, ZHOU Yan, RU Lingao()
Received:
2017-03-14
Online:
2017-09-10
Published:
2017-06-29
Contact:
HU Yanhong
E-mail:huyhxy@ecust.edu.cn
CLC Number:
TrendMD:
GU Yuanbo, HU Yanhong, DU Lei, DENG Shifeng, ZHOU Yan, RU Lingao. Reinforcement and Tougheness of Quartz Fiber/Silicon-containing Arylacetylene with Heat-resistant Polyetherimide Macromolecular Coupling Agent†[J]. Chem. J. Chinese Universities, 2017, 38(9): 1670.
Temperature/℃ | ILSS/MPa | Retention rate of ILSS | Flexural strength/MPa | Retention rate of flexural strength | ||||
---|---|---|---|---|---|---|---|---|
Untreated | 3.5%BDA-K | Untreated | 3.5%BDA-K | Untreated | 3.5%BDA-K | Untreated | 3.5%BDA-K | |
r. t. | 15.9 | 24.5 | 197.9 | 314.6 | ||||
250 | 14.1 | 21.8 | 88.7 | 89.0 | 181.6 | 281.8 | 91.8 | 89.6 |
500 | 8.6 | 15.5 | 54.1 | 63.3 | 121.7 | 213.5 | 61.5 | 67.9 |
Table 1 Mechanical properties of QF/PSA composites with 3.5%BDA-K at different temperature
Temperature/℃ | ILSS/MPa | Retention rate of ILSS | Flexural strength/MPa | Retention rate of flexural strength | ||||
---|---|---|---|---|---|---|---|---|
Untreated | 3.5%BDA-K | Untreated | 3.5%BDA-K | Untreated | 3.5%BDA-K | Untreated | 3.5%BDA-K | |
r. t. | 15.9 | 24.5 | 197.9 | 314.6 | ||||
250 | 14.1 | 21.8 | 88.7 | 89.0 | 181.6 | 281.8 | 91.8 | 89.6 |
500 | 8.6 | 15.5 | 54.1 | 63.3 | 121.7 | 213.5 | 61.5 | 67.9 |
Sample | Element distribution(%) | |||
---|---|---|---|---|
C1s | N1s | O1s | Si2p | |
QF | 56.26 | 9.31 | 21.83 | 12.60 |
QF-BDA-K | 69.22 | 6.30 | 16.87 | 7.61 |
Table 2 Surface element distributions of QF before and after treated by BDA-K
Sample | Element distribution(%) | |||
---|---|---|---|---|
C1s | N1s | O1s | Si2p | |
QF | 56.26 | 9.31 | 21.83 | 12.60 |
QF-BDA-K | 69.22 | 6.30 | 16.87 | 7.61 |
Binding energy/eV | Functional group | QF content(%) | QF-BDA-K content(%) |
---|---|---|---|
284.6 | —C—C—(C1s peak) | 56.12 | 64.81 |
286.1 | —C—N—(C1s peak) | 15.33 | 18.13 |
286.5 | —C—OH(C1s peak) | 21.56 | 13.23 |
288.2 | —C=O(C1s peak) | 6.99 | 3.83 |
398.3 | —N= in a cyclic structure(N1s peak) | 20.66 | 5.11 |
399.7 | —NH—CO—(N1s peak) | 79.34 | 62.85 |
400.4 | Imide ring(N1s peak) | 32.04 | |
531.6 | —C=O(O1s peak) | 16.61 | 14.32 |
531.9 | —Si—O—(O1s peak) | 35.46 | 46.90 |
532.6 | —C—OH(O1s peak) | 5.13 | 3.79 |
532.7 | SiO2(O1s peak) | 42.80 | 29.13 |
533.6 | C—O—C(O1s peak) | 5.86 | |
101.5 | —Si—O—Si—(Si2p peak) | 21.46 | |
102.3 | —Si—OH(Si2p peak) | 31.35 | 27.80 |
103.3 | SiO2(Si2p peak) | 68.65 | 50.74 |
Table 3 C1s, N1s, O1s and Si2p peaks affiliation and content of QF
Binding energy/eV | Functional group | QF content(%) | QF-BDA-K content(%) |
---|---|---|---|
284.6 | —C—C—(C1s peak) | 56.12 | 64.81 |
286.1 | —C—N—(C1s peak) | 15.33 | 18.13 |
286.5 | —C—OH(C1s peak) | 21.56 | 13.23 |
288.2 | —C=O(C1s peak) | 6.99 | 3.83 |
398.3 | —N= in a cyclic structure(N1s peak) | 20.66 | 5.11 |
399.7 | —NH—CO—(N1s peak) | 79.34 | 62.85 |
400.4 | Imide ring(N1s peak) | 32.04 | |
531.6 | —C=O(O1s peak) | 16.61 | 14.32 |
531.9 | —Si—O—(O1s peak) | 35.46 | 46.90 |
532.6 | —C—OH(O1s peak) | 5.13 | 3.79 |
532.7 | SiO2(O1s peak) | 42.80 | 29.13 |
533.6 | C—O—C(O1s peak) | 5.86 | |
101.5 | —Si—O—Si—(Si2p peak) | 21.46 | |
102.3 | —Si—OH(Si2p peak) | 31.35 | 27.80 |
103.3 | SiO2(Si2p peak) | 68.65 | 50.74 |
Fig.5 SEM images of the cross-sections of composite fracture(A, B) QF, r. t.; (C, D) 3.5%BDA-K/QF, r. t.; (E, F) 3.5%BDA-K/QF, 250 ℃; (G, H) 3.5%BDA-K/QF, 500 ℃. (A, C, E, G) Transverse; (B, D, F, H) longttudinal direction.
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