ABS树脂的核磁共振研究及单体含量对宏观性能的影响
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摘要
收集国内市场上几种常用的ABS树脂颗粒,采用核磁共振(1H NMR、13C NMR)法测定丙烯腈-丁二烯-苯乙烯共聚物(ABS)的单体组分含量和序列分布,GPC法测定游离SAN分子量及分布。考察了单体种类、含量、SAN分子量及分布对ABS树脂的力学性能及物理性能的影响。结果表明,增加丁二烯含量有利于提高产品的冲击强度,但产品的密度会降低;增加苯乙烯含量可提高产品的熔体质量流动速率和密度;增加丙烯腈含量和SAN分子量,产品的冲击强度和拉伸强度都有所提升。最后总结出每种产品的特点及适用领域。
Several common acrylonitrile-butadiene-styrene( ABS) resin particles in the domestic market were collected to analyze their composition and macroscopic properties. The monomer content and sequence distribution of ABS were determined by nuclear magnetic resonance spectroscopy(1 HNMR,13 CNMR),and molecular weights and molecular weight distribution by gel permeation chromatography( GPC). The monomer type,monomer content,relative molecular weights and distribution of SAN were measured to evaluate ABS resins' mechanical and physical properties. The results show that the increase of butadiene content is beneficial to improve the impact strength of the product,but the density decreases. Increasing the styrene content will increase the melt mass flow rate and density of the product; and when raising the acrylonitrile content or the molecular weights of SAN, the impact and stretch strengths of the product are improved.Finally,the characteristics and the applicable areas of each product were summed up.
Several common acrylonitrile-butadiene-styrene( ABS) resin particles in the domestic market were collected to analyze their composition and macroscopic properties. The monomer content and sequence distribution of ABS were determined by nuclear magnetic resonance spectroscopy(1 HNMR,13 CNMR),and molecular weights and molecular weight distribution by gel permeation chromatography( GPC). The monomer type,monomer content,relative molecular weights and distribution of SAN were measured to evaluate ABS resins' mechanical and physical properties. The results show that the increase of butadiene content is beneficial to improve the impact strength of the product,but the density decreases. Increasing the styrene content will increase the melt mass flow rate and density of the product; and when raising the acrylonitrile content or the molecular weights of SAN, the impact and stretch strengths of the product are improved.Finally,the characteristics and the applicable areas of each product were summed up.
引文
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[3]宋振彪,白延军,焦健,等.国内常见ABS产品对比剖析[J].弹性体,2011,21(1):49-53.
[4]王晓红,邹永春,麦堪成.橡胶含量对ABS树脂性能的影响[J].塑料科技,2016(4):61-65.
[5]王菊琳.阻燃ABS合金的研制[D].北京:北京化工大学,2000.
[6]许蔷.钕系苯乙烯-异戊二烯-丁二烯聚合物的研究[D].大连:大连理工大学,2014.
[7]曾焕庭.核磁共振对合成橡胶单体序列分布的研究[J].合成橡胶工业,1979,2(4):320-327.
[8]宋振彪,徐国华,张贵,等.国内ABS装置及产品分析[J].化工科技,2014,22(6):75-78.
[9]张雪芹.核磁共振方法在高分子聚合方面的应用[J].现代科学仪器,2001(6):29-32.
[10]张玉,张春庆,李杨,等.苯乙烯-异戊二烯-丁二烯三元乳液共聚合反应研究[J].弹性体,2010(5):15-19.
[11]吴春红.利用1H-NMR谱表征不同胶种的微观结构[J].石化技术,2015(7):57-58.
[12]宫立波,王博,盛光,等.苯乙烯-丁二烯-丙烯腈-异戊二烯共聚物结合单体含量的1H-NMR分析[J].化工科技,2016(2):54-56.
[13]杨晓峰,李曼尼,陈志萍.丙烯腈聚合行为的谱学研究[J].高分子材料科学与工程,2007(6):185-187.
[14]王菊琳,黄剑文.八种ABS树脂的流变性能比较研究[J].塑料工业,2007(S1):348-350.