[1]邹国享,李雄杰,赵彩霞,等.ATR-FTIR法研究聚丙烯热氧降解过程中羰基含量变化[J].常州大学学报(自然科学版),2016,(06):62-67.[doi:10.3969/j.issn.2095-0411.2016.06.012]
　ZOU Guoxiang,LI Xiongjie,ZHAO Caixia,et al.The Variation of Carbonyl Group Content in Polypropylene Matrix During Thermal-Oxidation Degradation with ATR-FTIR Method[J].Journal of Changzhou University(Natural Science Edition),2016,(06):62-67.[doi:10.3969/j.issn.2095-0411.2016.06.012]
点击复制

ATR-FTIR法研究聚丙烯热氧降解过程中羰基含量变化()
分享到：

常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2016年06期
页码:
62-67
栏目:
材料科学与工程
出版日期:
2016-11-30

文章信息/Info

Title:
The Variation of Carbonyl Group Content in Polypropylene Matrix During Thermal-Oxidation Degradation with ATR-FTIR Method
作者:
邹国享; 李雄杰; 赵彩霞; 李锦春
常州大学 材料科学与工程学院,江苏 常州213164
Author(s):
ZOU Guoxiang;  LI Xiongjie;  ZHAO Caixia;  LI Jinchun
School of Materials Science and Engineering,Changzhou University,Changzhou 213164,China
关键词:
聚丙烯;  热氧降解;  内标;  ATR-FTIR;  羰基
Keywords:
polypropylene;  thermal oxidation degradation;  internal standard;  ATR-FTIR;  carbonyl group
分类号:
O 6
DOI:
10.3969/j.issn.2095-0411.2016.06.012
文献标志码:
A
摘要:
以PS为内标物,利用ATR-FTIR法研究了聚丙烯热氧降解过程中羰基含量的变化。首先以不同物质的量之比的3-苯丙酸和己二酸为标样,计算了羰基(红外吸收峰1 716 cm-1)与苯环单取代基团(红外吸收峰699 cm-1)摩尔比与峰强的关系。通过拟合7组不同物质的量之比的羰基和苯环单取代基团的峰面积比,得到等物质的量峰强比K为6.39。从室温到220 ℃之间,PP/PS样品的红外谱图中未出现羰基的吸收峰; 当温度达到230 ℃时发现有明显的羰基峰出现,此时样品中的羰基含量为(0.55±0.13)×10—5 mol/g; 随着温度进一步升高,羰基含量快速增加,当温度为251 ℃时,羰基含量达到(10.41±1.13)×10—5 mol/g,此时温度的升高导致羰基稳定性变差,导致其分解速率增大,因此,在250～265 ℃羰基的增长速率减缓; 当温度为265 ℃时聚丙烯在热氧降解过程中产生的羰基含量最高,为(11.82±1.52)×10—5 mol/g; 当样品温度超过265 ℃,羰基的分解速率大于其生成速率,使得羰基含量呈下降趋势。
Abstract:
The polystyrene(PS)was employed as inter standard, the variation of carbonyl group content in polypropylene(PP)matrix during thermal-oxidation degradation was studied by ATR-FTIR in this work.The equimolar peak strength ratio(K)between carbonyl(1 716 cm-1)and mono-substituted benzene ring(699 cm-1)was calculated by fitting linear relationship between peak area ratio and mole ratio by varying the molar ratio of 3-benzenepropanoic acid and adipic acid. The K is equal to 6.39 in this work. The FTIR results implied that no carbonyl group was generated while the temperature is less than 220 ℃. As the temperature increased to 230 ℃, an obvious carbonyl group absorption peak was found, and the carbonyl group content is(0.55±0.13)×10-5 mol/g. After that, the carbonyl group content in PP matrix dramatically increased to(10.41±1.13)×10-5 mol/g at 251 ℃. The maximum carbonyl group content in PP matrix is(11.82±1.52)×10-5 mol/g while the temperature is 265 ℃. If the temperature is higher than 265 ℃, the stabilization of carbonyl group is deteriorated and the decomposition rate is faster than the generation rate, so the carbonyl group content in PP matrix decreased.

参考文献/References:

[1]ALABURDAITê R, KRYLOVA V. Study of thermo-oxidative chemical pre-treatment of isotactic polypropylene[J]. Journal of Thermal Analysis & Calorimetry, 2014, 118(2):1331-1338.
[2]YANG J, HUANG Y, LV Y, et al. The synergistic mechanism of thermally reduced graphene oxide and antioxidant in improving the thermo-oxidative stability of polypropylene[J]. Carbon, 2015, 89:340-349.
[3]BERTIN D, LEBLANC M, MARQUE S R A, et al. Polypropylene degradation: Theoretical and experimental investigations[J]. Oman Medical Journal, 2015, 30(2):95-9.
[4]CELINA M C. Review of polymer oxidation and its relationship with materials performance and lifetime prediction[J]. Polymer Degradation & Stability, 2013, 98(12):2419-2429.
[5]THORNBERG S M, BERNSTEIN R, IRWIN A N, et al. The genesis of CO2 and CO in the thermooxidative degradation of polypropylene[J]. Polymer Degradation & Stability, 2007, 92(1):94-102.
[6]FERNANDES L L, FREITAS C A, DEMARQUETTE N R, et al. Photodegradation of thermodegraded polypropylene/high-impact polystyrene blends: Mechanical properties[J]. Journal of Applied Polymer Science, 2011, 120(2):770-779.
[7]XIAO W, YU W, NIE Q,et al. A real-time study on the evolution of the degradation of polypropylene during mixing process[J]. Journal of Applied Polymer Science, 2011, 121(2):1220-1243.
[8]DAMODARAN S, SCHUSTER T, RODE K, et al. Measuring the orientation of chains in polypropylene welds by infrared microscopy: A tool to understand the impact of thermo-mechanical treatment and processing[J]. Polymer, 2015, 60:125-136.
[9]BRONSTEIN I. Simultaneous FTIR emission spectroscopy and chemiluminescence of oxidizing polypropylene: Evidence for alternate chemiluminescence mechanisms[J]. Macromolecules, 2001, 34(6):1873-1880.
[10]AKOLEKAR D B, NAIR S, ADSUL S, et al. Functionalization of polypropylene at high temperature under oxidative/inert environment[J]. Journal of Applied Polymer Science, 2012, 123(1):6981-6992.
[11]王晓, 王辉, 苏启标,等. 甚高温度下热氧处理聚丙烯形态和力学性能研究[J]. 中国塑料, 2011(6):54-59.
[12]陈键, 张桂云, 黄仕锋,等. 聚丙烯热氧老化机理的研究[J]. 中国塑料, 2015(7):63-66.
[13]XIAO W, YU W, NIE Q, et al. A real-time study on the evolution of the degradation of polypropylene during mixing process[J]. Journal of Applied Polymer Science, 2011, 121(2):1220-1243.
[14]GENSLER R, PLUMMER C J G, KAUSCH H H, et al. Thermo-oxidative degradation of isotactic polypropylene at high temperatures: Phenolic antioxidants versus HAS[J]. Polymer Degradation & Stability, 2000, 67(2):195-208.

相似文献/References:

[1]孙晓岚,李 震,郭少云.PP/ POE/ BaSO4 三元复合体系界面相互作用与拉伸断裂形态研究[J].常州大学学报(自然科学版),2006,(02):5.
　SUN Xiao- lan,LI Zhen,GUO Shao- yun.Interfacial Interaction and Tensile Fracture Morphology of PP/ POE/ BaSO4 Ternary Composites[J].Journal of Changzhou University(Natural Science Edition),2006,(06):5.
[2]高国生,刘春林,李　毅.甲基丙烯酸缩水甘油酯熔融接枝聚丙烯研究[J].常州大学学报(自然科学版),2003,(02):9.
　GAO Guo -sheng,LIU Chun -lin,LI Yi.Study on the Melt Graf ting Synthesis of Polypropylene-g -Glycidyl Methacrylate[J].Journal of Changzhou University(Natural Science Edition),2003,(06):9.
[3]龚方红,徐建平,刘春林.成核剂对聚丙烯性能的影响[J].常州大学学报(自然科学版),2003,(04):11.
　GONG Fang- hong,XU Jian- ping,LIU Chun- lin.Eff ect o f N uclear Ag ents o n Pr oper t ies o f Po ly pro py lene[J].Journal of Changzhou University(Natural Science Edition),2003,(06):11.
[4]徐建平,邓　健,张雪琴,等.聚丙烯超声波溶胀悬浮接枝聚苯乙烯[J].常州大学学报(自然科学版),2002,(01):7.
　XU Jian -ping,DENG Jian,ZHANG Xue -qing,et al.Suspension Graf ting of Styrene onto Polypropy lene by Swelling of Ultrasoni c Wave[J].Journal of Changzhou University(Natural Science Edition),2002,(06):7.

备注/Memo

备注/Memo:
收稿日期:2016-04-29。基金项目:国家自然科学基金资助项目(51473024)。作者简介:邹国享(1979—),男,湖北荆州人,博士,讲师。通讯联系人:李锦春(1964—),E-mail: lijinchun88@163.com
更新日期/Last Update: 2016-11-20