[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]
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ATR-FTIR法研究聚丙烯热氧降解过程中羰基含量变化()
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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.

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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