不同温度下丁羟包覆层的横向弛豫时间与拉伸性能的相关性
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摘要
为了研究不同温度下丁羟包覆层的横向弛豫时间与拉伸性能的相关性,开展了核磁共振和拉伸应力-应变性能测定试验。单因素方差分析表明温度对横向弛豫时间有显著影响;试验温度从30℃升到90℃,横向弛豫时间呈线性增大;90℃升到130℃,横向弛豫时间先减小后增大。30～90℃,升温使包覆层的拉伸强度下降,断裂伸长率升高;在100℃较90℃强度得到了提高,断裂伸长率稍有降低;在100～130℃时,受复杂化学反应和分子热运动共同影响,断裂伸长率迅速增加,强度降低。断裂伸长率、拉伸强度均与横向弛豫时间存在较好的相关性,利用该关系可以预测丁羟包覆层在不同横向弛豫时间下的拉伸性能。
The tests of nuclear magnetic resonance(NMR)and tensile mechanical properties were undertaken,aimingto analyze the correlation between the transverse relaxation time and tensile properties of hydroxyl-terminated polybutadiene(HTPB)inhibitor at different temperature. One-way analysis of variance shows that temperature has a significant influenceon transverse relaxation time. Transverse relaxation time increases linearly while the test temperature rises from 30 ℃ to90 ℃. From 90 ℃ to 130 ℃,transverse relaxation time decreases,then follows by an increase. Within the range from 30 ℃to 90 ℃,the rise of temperature brings down tensile strength,and makes elongation at break increase. The strength of thematerial at 100 ℃ is higher than that at 90 ℃,but the elongation is a slight lower. However,raising the temperature from100 ℃ to 130 ℃,the elongation at break increases drastically while the material loses its strength,due to the influenceof complicated chemical reaction and molecular thermal motion. Moreover,both the elongation at break and the tensilestrength have the good correlations with transverse relaxation time. Based on that raltionship,the tensile mechanicalproperties of HTPB inhibitor can be predicted at different transverse relaxation time.
The tests of nuclear magnetic resonance(NMR)and tensile mechanical properties were undertaken,aimingto analyze the correlation between the transverse relaxation time and tensile properties of hydroxyl-terminated polybutadiene(HTPB)inhibitor at different temperature. One-way analysis of variance shows that temperature has a significant influenceon transverse relaxation time. Transverse relaxation time increases linearly while the test temperature rises from 30 ℃ to90 ℃. From 90 ℃ to 130 ℃,transverse relaxation time decreases,then follows by an increase. Within the range from 30 ℃to 90 ℃,the rise of temperature brings down tensile strength,and makes elongation at break increase. The strength of thematerial at 100 ℃ is higher than that at 90 ℃,but the elongation is a slight lower. However,raising the temperature from100 ℃ to 130 ℃,the elongation at break increases drastically while the material loses its strength,due to the influenceof complicated chemical reaction and molecular thermal motion. Moreover,both the elongation at break and the tensilestrength have the good correlations with transverse relaxation time. Based on that raltionship,the tensile mechanicalproperties of HTPB inhibitor can be predicted at different transverse relaxation time.
引文
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[2]SONG B,CHEN W.One-dimensional dynamic compressive behavior of EPDM rubber[J].Journal of Engineering Materials and Technology,2003,125(3):294-301.
[3]YU J Q,ZHENG J,ZHOU Q C,et al.Research on debonding property of CMDB/EPDM coating interface[J].Journal of Solid Rocket Technology,2015,38(4):528-532.
[4]BILLA N R,P.JAYA P Y,KURUMA M,et al.Triazine functionalized hydroxyl terminated polybutadiene polyurethane:Influence of triazine structure[J].Polymer,2015(77):323-333.
[5]CHEN S H,YU K C,HONG S L,et al.Gas transport properties of HTPB based polyurethane/cosalen membrane[J].JMembr.Sci.,2000(173):99-106.
[6]ZHANG X,ZHANG J,FANG H M,et al.Surface modified grapheme oxide cross-linking with hydroxyl-terminated polybutadiene polyurethane:effects on structure and properties[J].Composites:Part A,2017(103):208-218.
[7]KRYKIN M A,VOLKOY V I,VOLKOY E V,et al.Structure and dynamics of poly(carbosilane)dendrimers as revealed by pulsed field gradient NMR technique[J].Applied Magnetic Resonance,2005,29:459.
[8]FR?HLICH A F,?STERGAARD L,KISELEV V G.Effect of impermeable interfaces on apparent diffusion coefficient in heterogeneous media[J].Applied Magnetic Resonance,2005,(29):123.
[9]SEKKAR V,BHAGAWAN S S,PRABHAKARAN N,et al.Polyurethanes based on hydroxyl terminated polybutadiene:modeling of network parameters and correlation with mechanical properties[J].Polymer,2000(41):6773-6786.
[10]李松年,王罗新,刘勇,等.粘合剂活性基团对HTPB推进剂力学性能的影响机制[J].复合材料学报,2009,26(4):79-82.
[11]颜红,唐承志.提高高燃速丁羟推进剂低温伸长率的研究[J].推进技术,2003,24(6):563-566.
[12]张伟,谢五喜,樊学忠,等.扩链和交联剂对NEPE推进剂胶片高温力学性能的影响[J].含能材料,2007,15(4):349-351.
[13]倪冰,覃光明,冉秀伦.GAP/HTPB共混粘合剂体系的力学性能研究[J].含能材料,2010,18(2):167-173.
[14]刘晶如,宋雪晶,杨寅.NEPE推进剂粘合剂网络结构调节研究[J].固体火箭技术,2010,3(1):72-76.
[15]阿克洛尼斯,马可尼特,沈明琦.聚合物粘弹性引论[M].北京:中国宇航出版社,2015.
[16]BOGAYCHUK A,SINYAVSKY N,KUPRIYANOVAG.Investigation of polymer degradation using NMR relaxometry with inverse Laplace transformation[J].Applied Magnetic Resonance,2016(47):1409-1417.
[17]SHEN Y,FEI L,ZHAO X.Study ofγ-irradiation crosslinking ofcis-1,4-polybutadiene by NMR microscopy[J].Applied Magnetic Resonance,1995(8):181-186.
[18]POJI?M,MUSSE M,RONDEAU C,et al.Overall and local bread expansion,mechanical properties,and molecular structure during bread baking:effect of emulsifying starches[J].Food&Bioprocess Technology,2016,9(8):1287-1305.
[19]LACOURPAILLE L,NORDEZ A,HUG F,et al.Timecourse effect of exercise-induced muscle damage on localized muscle mechanical properties assessed using elastography[J].Acta Physiologica,2014,211(1):135-146.
[20]贾林,谢五喜,杜姣姣,等.利用LF_NMR研究燃速催化剂对推进剂固化反应的影响[J].固体火箭技术,2015,38(5):697-706.
[21]俎栋林,高家红.核磁共振成像-物理原理和方法[M].北京:北京大学出版社,2014.
[22]赵颖.应用数理统计[M].北京:北京理工大学出版社,2008.
[23]赵菲,毕薇娜,张萍,等.用核磁共振法研究促进剂对硫磺硫化天然橡胶结构的影响[J].合成橡胶工业,2008,31(1):50-53.