| 二异氰酸酯对聚碳酸亚丙酯熔体流变性能的影响 |
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| 引用本文： | 蒋 霞;汪 海;肖荔人;钱庆荣;陈庆华. 二异氰酸酯对聚碳酸亚丙酯熔体流变性能的影响[J]. 中国塑料, 2011, 25(2): 72-78. DOI: 10.19491/j.issn.1001-9278.2011.02.015 |
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| 作者姓名： | 蒋 霞 汪 海 肖荔人 钱庆荣 陈庆华 |
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| 作者单位： | 福建师范大学化学与材料学院福建师范大学化学与材料学院 |
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| 基金项目： | 福建省重大专项专题项目(2007HZ0001-1); 福建省环境友好高分子材料工程技术研究中心建设基金(2009H2004); 福建省高分子材料重点实验室测试基金 |
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| 摘 要： | 以4,4-二苯基甲烷二异氰酸酯（MDI）为扩链剂，在转矩流变仪上通过一步法对聚碳酸亚丙酯（PPC）进行了熔融扩链改性。结果表明，随着MDI用量的增加，扩链反应峰和平衡扭矩逐渐增大、平衡时间不断延长；红外光谱分析表明，扩链改性后的PPC在1600 、1535 cm-1处分别出现了苯环的骨架振动吸收峰和-NH的特征吸收峰；旋转流变分析表明，扩链改性后PPC的储能模量、损耗模量和复数黏度均随MDI用量的增加而增加；从Cole-Cole曲线可以看出，随着MDI用量的增加，扩链改性后PPC的相对分子质量逐渐增加，相对分子质量分布变宽，支化度提高；应力松弛测试结果表明，随着MDI用量的增加，松弛时间逐渐增加。
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| 关 键 词： | 聚碳酸亚丙酯 二异氰酸酯 流变性能 扩链 |
| 收稿时间： | 2010-11-29 |
Effect of MDI on Melt Rheological Behavior of Poly(propylene carbonate) |
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| JIANG Xia,WANG Hai,XIAO Liren,QIAN Qingrong,CHEN Qinghua. Effect of MDI on Melt Rheological Behavior of Poly(propylene carbonate)[J]. China Plastics, 2011, 25(2): 72-78. DOI: 10.19491/j.issn.1001-9278.2011.02.015 |
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| Authors: | JIANG Xia WANG Hai XIAO Liren QIAN Qingrong CHEN Qinghua |
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| Affiliation: | JIANG Xia,WANG Hai,XIAO Liren,QIAN Qingrong,CHEN Qinghua(Fujian Engineering Research Center of Environmentally-friendly Polymer Materials,College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China) |
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| Abstract: | In this study, poly(propylene carbonate) (PPC) was chain extended with 4,4-diphenylmethylene diisocyanate（MDI）via melt reaction. On the FTIR spectra, the absorption bands observed at 1600 and 1535 cm-1 were attributed to the vibration of benzene ring and -N-H (amide Ⅱgroups), respectively, suggesting the occurrence of chain extend reaction. The dynamic rheological tests showed that MDI-modified PPC had higher storage and loss moduli and complex viscosity than unmodified PPC. Moreover, modified Cole-Cole plots revealed that the MDI-modified PPC samples possessed higher elasticity, broader molecular weight distribution, longer stress relaxation time than neat PPC. |
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| Keywords: | poly(propylene carbonate) diphenylmethylene diisocyanate chain extension rheologi-cal behavior |
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