电子束辐照对尼龙12结构和热性能的影响
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摘要
在空气氛围中,对尼龙12 (PA12)进行电子束辐照,探讨吸收剂量对其结构和热性能的影响。通过机械性能测试、傅里叶变换红外光谱(FTIR)、差示量热扫描(DSC)和X射线衍射(XRD)等方法对样品的结构和热性能进行表征。结果表明:随着吸收剂量不断增加,PA12的断裂伸长率逐渐降低,在1 600 kGy时接近0%,而断裂强度在1 600 kGy时仍有42 MPa;样品白度随着吸收剂量的增加呈下降趋势;FTIR测试表明,羰基指数和N–H的面外弯曲强度随吸收剂量的增加而增大;DSC测试结果表明,随着吸收剂量的增加,PA12的结晶焓和熔点逐渐下降;XRD测试结果则表明,电子束辐照没有改变PA12的晶型结构。
Nylon 12(PA12) was irradiated by an electron-beam in air. The structure and thermal properties of the samples with different absorbed doses were studied by mechanical testing, Fourier transform infrared(FTIR) spectroscopy, differential scanning calorimetry(DSC), and X-ray diffraction(XRD). The results showed that the elongation at break of PA12 decreased gradually with increasing absorbed doses, approaching 0% at an absorbed dose of 1 600 kGy, at which the tensile strength was 42 MPa. The whiteness of PA12 decreased with increasing absorbed doses. FTIR spectra showed that the carbonyl index and N–H bend strength of PA12 increased with absorbed doses. DSC results showed that the crystallization enthalpy and melting point of PA12 decreased gradually with increasing absorbed doses. XRD results showed that electron-beam irradiation did not change the crystal structure of PA12.
Nylon 12(PA12) was irradiated by an electron-beam in air. The structure and thermal properties of the samples with different absorbed doses were studied by mechanical testing, Fourier transform infrared(FTIR) spectroscopy, differential scanning calorimetry(DSC), and X-ray diffraction(XRD). The results showed that the elongation at break of PA12 decreased gradually with increasing absorbed doses, approaching 0% at an absorbed dose of 1 600 kGy, at which the tensile strength was 42 MPa. The whiteness of PA12 decreased with increasing absorbed doses. FTIR spectra showed that the carbonyl index and N–H bend strength of PA12 increased with absorbed doses. DSC results showed that the crystallization enthalpy and melting point of PA12 decreased gradually with increasing absorbed doses. XRD results showed that electron-beam irradiation did not change the crystal structure of PA12.
引文
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15曾威,王笛,张立平,等.电子束辐射对玻纤/尼龙6复合材料性能的影响[J].复合材料学报,2017,34(9):1895-1901.DOI:10.13801/j.cnki.fhclxb.20161124.007.ZENG Wei,WANG Di,ZHANG Liping,et al.Electric beam irradiation effect on properties of glass fibers/nylon6 composites[J].Acta Materiae Compositae Sinica,2017,34(09):1895-1901.DOI:10.13801/j.cnki.fhclxb.20161124.007.
16连铁军,徐闻,刘鹏波,等.电子束辐照对HDPE/PA6共混体系的影响[J].高分子材料科学与工程,2003,19(1):172-174.DOI:10.16865/j.cnki.1000-7555.1997.01.022.LIAN Tiejun,XU Wen,LIU Pengbo,et al.Effect of electron beam irradiation on the HDPE/PA6 blend[J].Polymeric Materials Science&Engineering,2003,19(1):172-174.DOI:10.16865/j.cnki.1000-7555.1997.01.022.
17桑伟,周岚,冯新星,等.电子束辐照对尼龙66纤维结构和力学性能的影响[J].高分子材料科学与工程,2016,32(2):99-103,108.DOI:10.16865/j.cnki.1000-7555.2016.02.018.SANG Wei,ZHOU Lan,FENG Xinxing,et al.Effects of electron beam irradiation on the structure and mechanical properties of nylon 66 fiber[J].Polymeric Materials Science&Engineering,2016,32(2):99-103,108.DOI:10.16865/j.cnki.1000-7555.2016.02.018.
18郭丹,许广华,廖增强,等.电子束辐照增容PA66/PP共混体系:微结构与力学性能[J].塑料工业,2017,45(12):41-44.GUO Dan,XU Guanghua,LIAO Zengqiang,et al.PA66/PP blend compatibilized by electron beam irradiation:microstructure and mechanical properties[J].China Plastics Industry,2017,45(12):41-44.
19王洪龙.超高分子量聚乙烯辐射效应与改性研究[D].上海:中国科学院上海应用物理研究所,2017.WANG Honglong.Radiation effect and modification of UHMWPE[D].Shanghai:Shanghai Institute of Applied Physics,Chinese Academy of Sciences,2017.
20吕亚非,杨小震,朱善农,等.尼龙1010红外光谱的研究[J].化学学报,1983,41(6):525-533.LYU Yafei,YANG Xiaozhen,ZHU Shannong,et al.Study on infrared spectra of nylon 1010[J].Acta Chimica Sinica,1983,41(6):525-533.
21 Rafiq R,Cai D Y,Jin J,et al.Increasing the toughness of nylon 12 by the incorporation of functionalized grapheme[J].Carbon,2010,48(15):4309-4314.DOI:10.1016/j.carbon.2010.07.043.
22李勇进.长烷基链偶偶尼龙的合成及结晶行为[D].上海:上海交通大学,2002.LI Yongjin.Synthesis and crystallization behavior of long alkane segments even-even nylons[D].Shanghai:Shanghai Jiao Tong University,2002.
2陈乐怡.发泡聚烯烃技术进展[J].中国塑料,1990,4(4):10-17.DOI:10.19491/j.issn.1001-9278.1990.04.002.CHEN Leyi.Technical progress of foamed polyolefin[J].China Plastics,1990,4(4):10-17.DOI:10.19491/j.issn.1001-9278.1990.04.002.
3王亚珍,张丽叶,段景宽,等.辐照交联聚烯烃/NR热塑性弹性体发泡材料辐照效应的研究[J].塑料,2007,36(2):68-72.WANG Yazhen,ZHANG Liye,DUAN Jingkuan,et al.Radiation effects onγadiation crosslinked polyolefin/NRthermoplastic elastomer foams[J].Plastics,2007,36(2):68-72.
4聚烯烃的常压交联发泡方法[J].塑料,1973(4):55-64.Atmospheric pressure cross-linking foaming method for polyolefin[J].Plastics,1973(4):55-64.
5赵成刚.热缩管的最新扩张技术[J].塑料制造,2008(9):55-58.DOI:10.16587/j.cnki.issn1727-2890.2008.09.008ZHAO Chenggang.The new expansion technologies for heat-shrinkable tubing[J].Plastics Manufacture,2008(9):55-58.DOI:10.16587/j.cnki.issn1727-2890.2008.09.008
6蔡文彬,络强.电线电缆的辐射加工和辐照交联电缆[J].机电,1998(5):58-60.CAI Wenbin,LUO Qiang.Radiation processing and radiation cross-linked cable for wire and cable[J].Mechanical&Electrical Engineering Magazine,1998(5):58-60.
7孙伟.辐照交联在电线电缆中的应用[J].原子核物理评论,1987,4(3):44-49.DOI:10.11804/NuclPhysRev.04.03.044.SUN Wei.Application of irradiation cross-linking in wire and cable[J].Nuclear Physics Review,1987,4(3):44-49.DOI:10.11804/NuclPhysRev.04.03.044
8严永昌.辐照交联在电线电缆中的应用[J].电线电缆,1986(6):10-13.DOI:10.16105/j.cnki.dxdl.1986.06.003YAN Yongchang.Application of irradiation cross-linking in wire and cable[J].Electric Wire&Cable,1986(6):10-13.DOI:10.16105/j.cnki.dxdl.1986.06.003
9 Wang L,Kiziltas A.Mielewski D F,et al.Closed-loop recycling of polyamide12 powder from selective laser sintering into sustainable composites[J].Journal of Cleaner Production,2018,195(1):765-772.DOI:10.1016/j.jclepro.2018.05.235.
10 Craft G,Nussbaum J,Crane N,et al.Impact of extended sintering times on mechanical properties in PA-12 parts produced by powder bed fusion processes[J],Additive Manufacturing,2018,22:800-806.DOI:10.1016/j.addma.2018.06.028.
11 Li J P,Philippe C,Eliane E,et al.Specific properties of in situ ruthenium-catalyzed polyamide 12/polydimethylsiloxane compatibilized blend[J].Journal of Polymer Science Part B:Polymer Physics,2018,56(13):978-988.DOI:DOI:10.1002/polb.24613.
12 Reffai Y I S M,Chatterjee T,Naskar K.Exploring the influence of radiation crosslinking on high-performance hydrogenated acrylonitrile butadiene rubber and polyamide 12 based blends with special reference to heat and oil resistance[J],Radiation Physics and Chemistry,2018,148:50-59.DOI:10.1016/j.radphyschem.2018.02.024.
13 Dencheva N,Denchev Z,Oliveira M J,et al.Relationship between the crystalline structure and mechanical behavior in isotropic and oriented polyamide 12[J].Journal of Applied Polymer Science,2008,109(1):288-302.DOI:10.1002/app.27938.
14 Chatterjee T,Basu D,Das A,et al.Super thermoplastic vulcanizates based on carboxylated acrylonitrile butadiene rubber(XNBR)and polyamide(PA12)[J].European Polymer Journal,2016,78:235-252.DOI:10.1016/j.eurpolymj.2016.03.027.
15曾威,王笛,张立平,等.电子束辐射对玻纤/尼龙6复合材料性能的影响[J].复合材料学报,2017,34(9):1895-1901.DOI:10.13801/j.cnki.fhclxb.20161124.007.ZENG Wei,WANG Di,ZHANG Liping,et al.Electric beam irradiation effect on properties of glass fibers/nylon6 composites[J].Acta Materiae Compositae Sinica,2017,34(09):1895-1901.DOI:10.13801/j.cnki.fhclxb.20161124.007.
16连铁军,徐闻,刘鹏波,等.电子束辐照对HDPE/PA6共混体系的影响[J].高分子材料科学与工程,2003,19(1):172-174.DOI:10.16865/j.cnki.1000-7555.1997.01.022.LIAN Tiejun,XU Wen,LIU Pengbo,et al.Effect of electron beam irradiation on the HDPE/PA6 blend[J].Polymeric Materials Science&Engineering,2003,19(1):172-174.DOI:10.16865/j.cnki.1000-7555.1997.01.022.
17桑伟,周岚,冯新星,等.电子束辐照对尼龙66纤维结构和力学性能的影响[J].高分子材料科学与工程,2016,32(2):99-103,108.DOI:10.16865/j.cnki.1000-7555.2016.02.018.SANG Wei,ZHOU Lan,FENG Xinxing,et al.Effects of electron beam irradiation on the structure and mechanical properties of nylon 66 fiber[J].Polymeric Materials Science&Engineering,2016,32(2):99-103,108.DOI:10.16865/j.cnki.1000-7555.2016.02.018.
18郭丹,许广华,廖增强,等.电子束辐照增容PA66/PP共混体系:微结构与力学性能[J].塑料工业,2017,45(12):41-44.GUO Dan,XU Guanghua,LIAO Zengqiang,et al.PA66/PP blend compatibilized by electron beam irradiation:microstructure and mechanical properties[J].China Plastics Industry,2017,45(12):41-44.
19王洪龙.超高分子量聚乙烯辐射效应与改性研究[D].上海:中国科学院上海应用物理研究所,2017.WANG Honglong.Radiation effect and modification of UHMWPE[D].Shanghai:Shanghai Institute of Applied Physics,Chinese Academy of Sciences,2017.
20吕亚非,杨小震,朱善农,等.尼龙1010红外光谱的研究[J].化学学报,1983,41(6):525-533.LYU Yafei,YANG Xiaozhen,ZHU Shannong,et al.Study on infrared spectra of nylon 1010[J].Acta Chimica Sinica,1983,41(6):525-533.
21 Rafiq R,Cai D Y,Jin J,et al.Increasing the toughness of nylon 12 by the incorporation of functionalized grapheme[J].Carbon,2010,48(15):4309-4314.DOI:10.1016/j.carbon.2010.07.043.
22李勇进.长烷基链偶偶尼龙的合成及结晶行为[D].上海:上海交通大学,2002.LI Yongjin.Synthesis and crystallization behavior of long alkane segments even-even nylons[D].Shanghai:Shanghai Jiao Tong University,2002.