| EFFECT OF N,N,N’,N’-TETRAALKYL TEREPHTHALAMIDE ON NON-ISOTHERMAL CRYSTALLIZATION KINETICS OF POLYPROPYLENE |
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| 作者姓名： | Bao-qing Shentu Ji-peng Li Zhi-xue Weng |
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| 作者单位： | State Key Laboratory of Polymer Reaction Engineering, Department of Chemical Engineering, Zhejiang University Hangzhou 310027, China |
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| 基金项目： | This work was supported by the Scientific Research Foundation for Returned 0verseas Chinese Scholars, Ministry of Education. |
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| 摘 要： | The effect of N,N,N＇,N＇-tetraalkyl terephthalamide （TATA） on the non-isothermal crystallization and melting characteristics ofpolypropylene （PP） was studied. The addition of TATA can lead to the formation ofβ-crystal PP. With the increase in TATA concentration the degree of crystallinity for β-crystal PP increased significantly, and that for a-crystal PP decreased, which indicated that TATA effectively induced the formation of β-crystal PP. WAXD also revealed the existence of β-crystal PP after the introduction of TATA into PP. PP containing TATA crystallized at a temperature range of 5-10℃ higher than that of pure PP, and the half-crystallization time （t1/2） and Avrami exponent （n） of PP at the same cooling rate were decreased by the addition of TATA, indicating that TATA influenced the crystallization rate and crystallization growth mode of PP. The rate constant of crystallization of PP containing TATA （Zc） was larger than that of pure PP, which further indicated that the crystallization of PP was accelerated by the addition of TATA.
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| 关 键 词： | 聚丙烯 N N N＇ N＇-四烷基对苯二氨基化合物 非等温结晶动力学 β-晶体 |
| 收稿时间： | 2005-07-28 |
| 修稿时间： | 2005-09-06 |
EFFECT OF N,N,N’,N’-TETRAALKYL TEREPHTHALAMIDE ON NON-ISOTHERMAL CRYSTALLIZATION KINETICS OF POLYPROPYLENE |
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| Bao-qing Shentu Ji-peng Li Zhi-xue Weng.EFFECT OF N,N,N’,N’-TETRAALKYL TEREPHTHALAMIDE ON NON-ISOTHERMAL CRYSTALLIZATION KINETICS OF POLYPROPYLENE[J].Chinese Journal of Polymer Science,2006,0(4):345-351. |
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| Authors: | Bao-qing Shentu Ji-peng Li Zhi-xue Weng |
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| Institution: | Bao-qing Shentu;Ji-peng Li;Zhi-xue Weng.EFFECT OF N,N,N’,N’-TETRAALKYL TEREPHTHALAMIDE ON NON-ISOTHERMAL CRYSTALLIZATION KINETICS OF POLYPROPYLENE[J] Chinese Journal of Polymer Science (CJPS), 2006,V24(4): 345-351 |
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| Abstract: | The effect of N,N,N,N-tetraalkyl terephthalamide (TATA) on the non-isothermal crystallization and melting characteristics of polypropylene (PP) was studied. The addition of TATA can lead to the formation of b-crystal PP. With the increase in TATA concentration the degree of crystallinity for b-crystal PP increased significantly, and that for a-crystal PP decreased, which indicated that TATA effectively induced the formation of b-crystal PP. WAXD also revealed the existence of b-crystal?PP after the introduction of TATA into PP. PP containing TATA crystallized at a temperature range of 5-10℃ higher than that of pure PP, and the half-crystallization time (t1/2) and Avrami exponent (n) of PP at the same cooling rate were decreased by the addition of TATA, indicating that TATA influenced the crystallization rate and crystallization growth mode of PP. The rate constant of crystallization of PP containing TATA (Zc) was larger than that of pure PP, which further indicated that the crystallization of PP was accelerated by the addition of TATA |
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| Keywords: | Polypropylene N N N′ N′-tetraalkyl terephthalamide Non-isothermal crystallization kinetics [[beta]]-crystal |
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