高等学校化学学报

高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (5): 1264.doi: 10.7503/cjcu20121048

• 高分子化学 • 上一篇    下一篇

阻燃PVA-g-AN的制备、表征及性能

任元林1,2, 苏倩1, 信鹏月1   

  1. 1. 天津工业大学纺织学院, 天津 300387;
    2. 天津工业大学先进纺织复合材料教育部重点实验室, 天津 300387
  • 收稿日期:2012-11-17 出版日期:2013-05-10 发布日期:2013-05-10
  • 通讯作者: 任元林, 男, 博士, 副教授, 主要从事阻燃高分子材料研究. E-mail: yuanlinr@163.com E-mail:yuanlinr@163.com
  • 基金资助:

    教育部高等学校博士学科点专项科研基金(批准号: 20101201120002)和天津市自然科学基金(批准号: 12JCYBJC11500)资助.

Preparation, Characterization and Property of FR-PVA-g-AN

REN Yuan-Lin1,2, SU Qian1, XIN Peng-Yue1   

  1. 1. Department of Textile, Tianjin Polytechnic University, Tianjin 300387, China;
    2. Key Laboratory of Advanced Textile Composite, Ministry of Education, Tianjin Polytechnic University, Tianjin 300387, China
  • Received:2012-11-17 Online:2013-05-10 Published:2013-05-10

PDF (PC)

被引次数

7

摘要：

以K2S2O8-NaHSO3氧化还原体系为引发剂, 将丙烯腈(AN)接枝到聚乙烯醇(PVA)上, 得到聚乙烯醇接枝丙烯腈聚合物(PVA-g-AN), 将其与磷酸-尿素反应制备阻燃聚乙烯醇接枝丙烯腈聚合物(FR-PVA-g-AN). 利用傅里叶变换红外光谱(FTIR)、 X射线能谱(XPS)和X射线衍射(XRD)对其结构进行表征, 并用热重分析(TGA)对其热性能进行研究. 结果表明, 当引发剂用量占反应物总质量的1%, n(K2S2O8):n(NaHSO3)=5:1, m(丙烯腈):m(聚乙烯醇)=3.5:1, 70 ℃反应4 h时, 接枝率可达190%; 在m(磷酸):m(尿素)=5:1, 85 ℃条件下处理接枝产物PVA-g-AN 4 h时, 获得阻燃性能良好的FR-PVA-g-AN, 700 ℃马弗炉热处理后, 残炭量达到63%. TGA结果显示, FR-PVA-g-AN的热降解过程较PVA减慢, 且800 ℃后残炭量由PVA的3.12%增加到54.3%, 说明FR-PVA-g-AN具有优异的热稳定性和成炭性.

关键词: 聚乙烯醇, 丙烯腈, 接枝, 阻燃, 热性能

Abstract:

Flame retardant polyvinyl alcohol(PVA) grafted with acrylonitrile(AN)(FR-PVA-g-AN) was prepared via grafting copolymerization of AN onto PVA (PVA-g-AN) using K2S2O8-NaHSO3 as initiator followed by the chemical modification reaction with phosphoric acid and urea. The structure of FR-PVA-g-AN was characterized by Fourier transform infared spectroscope(FTIR), X-ray photoelectron spectroscopy(XPS) and X-ray diffraction(XRD), and the thermal property was studied by thermogravimetric analysis(TGA). The results show that the grafting percent reaches 190% under the condition of the mass fraction of initiator being 1% of the total reactant, the molar ratio of K2S2O8 to NaHSO3 being 5:1, the mass ratio of AN to PVA being 3.5:1, and reaction temperature being 70 ℃, and the reaction time of 4 h. The FR-PVA-g-AN with excellent fire retardancy can be obtained with the mass ratio of phosphoric acid to urea being 5:1 and reaction temperature of 85 ℃ for 4 h. There is about 63% char residue left after FR-PVA-g-AN was treated at 700 ℃ with muffle. The TGA curves indicate that the thermo-oxidative degradation of FR-PVA-g-AN is slower than that of PVA, and the char residue of FR-PVA-g-AN increases to 54.3% at 800 ℃, while the char residue of PVA is only 3.12%, which fully proves that FR-PVA-g-AN has better thermal stability and char forming capability.

Key words: Polyvinyl alcohol, Acrylonitrile, Graft, Flame retardant, Thermal property

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