Chain extension and modification of polypropylene carbonate using diphenylmethane diisocyanate
Chain extension and modification of polypropylene carbonate using diphenylmethane diisocyanate
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二苯甲烷二异氰酸酯对聚碳酸亚丙酯的扩链和改性
DOI：
10.1002/pi.4947
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发表时间：
2015-10
影响因子：
3.2
通讯作者：
王雯
中科院分区：
文献类型：
--
作者：
翁云宣;刁晓倩;杨楠;王雯
本工作以二苯基甲烷二异氰酸酯（MDI）为扩链剂，对聚碳酸亚丙酯（PPC）进行扩链改性。采用傅里叶变换红外光谱、凝胶渗透色谱、热重和元素分析等手段表征了改性后PPC化学、热学和力学性能的变化。实验结果表明，MDI和PPC熔融共混时，PPC中的末端羟基可以与MDI中的异氰酸酯基发生反应，导致PPC扩链。通过改性，可以显着提高PPC的物理性能和热稳定性。添加1.5%MDI后，玻璃化转变温度从14.1℃升高到28.2℃，热分解温度T−5%从162.7℃升高到246.8℃。此外，改性PPC的拉伸强度从3.1 MPa提高到20.3 MPa。 © 2015 中国化工学会
In the present work, with the application of diphenylmethane diisocyanate (MDI) as the chain extender, poly(propylene carbonate) (PPC) was modified by chain extension. The changes in the chemical, thermal and mechanical properties of PPC after modification were characterized by Fourier transform infrared spectroscopy, gel permeation chromatography, thermogravimetry and elemental analysis. The experimental results indicate that during melt blending of MDI and PPC the terminal hydroxyl group in PPC can react with the isocyanate group in MDI, leading to chain extension of PPC. Via modification, the physical properties and thermal stability of PPC can be enhanced considerably. With the addition of 1.5% MDI, the glass transition temperature increased from 14.1 °C to 28.2 °C and the thermal decomposition temperatureT−5%increased from 162.7 °C to 246.8 °C. Moreover, the tensile strength of the modified PPC was improved from 3.1 MPa to 20.3 MPa. © 2015 Society of Chemical Industry
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影响因子：
5.9
作者：
Shuwen Peng;Y. An;Cheng Chen;B. Fei;Yugang Zhuang;Li-song Dong
通讯作者：
Shuwen Peng;Y. An;Cheng Chen;B. Fei;Yugang Zhuang;Li-song Dong
影响因子：
3.2
作者：
R. Nirmala;R. Navamathavan;M. El‐Newehy;H. Y. Kim
通讯作者：
R. Nirmala;R. Navamathavan;M. El‐Newehy;H. Y. Kim
影响因子：
3.2
作者：
Yan-ping Hao;Huanhuan Ge;Lijing Han;Hongyu Liang;Huiliang Zhang;Li-song Dong
通讯作者：
Yan-ping Hao;Huanhuan Ge;Lijing Han;Hongyu Liang;Huiliang Zhang;Li-song Dong
DOI：
10.1002/pola.22911
发表时间：
2008-09
期刊：
Journal of Polymer Science Part A
影响因子：
--
作者：
Yusheng Qin;Xianhong Wang;Suobo Zhang;Xiao-jiang Zhao;Fo-song Wang
通讯作者：
Yusheng Qin;Xianhong Wang;Suobo Zhang;Xiao-jiang Zhao;Fo-song Wang
影响因子：
3
作者：
Jin Wang;D. Shu;M. Xiao;Y. Meng
通讯作者：
Jin Wang;D. Shu;M. Xiao;Y. Meng