Crystallization and melting behaviors of the β-nucleated isotactic polypropylene with different melt structures – The role of molecular weight
作者： Jian Kang , Zhengfang Chen , Jinyao Chen , Feng Yang , Gengsheng Weng
DOI: 10.1016/J.TCA.2014.11.011
关键词:
摘要: Abstract To elucidate influence of molecular weight on crystallization behavior β-nucleated isotactic polypropylene (β-nucleated iPP) with different melt structures, a series iPP varying weights were prepared. Results revealed that higher was more favorable for formation high β-phase proportion ( β c ). By tuning heating temperature T f ), the structure (content ordered structures within melt) controlled. It found all samples, evidently elevated decrease , indicating occurrence synergetic effect between and β-NA (ordered effect, OSE); weight, triggered by OSE increased gradually range decreased. Moreover, as holding time at from 1 to 120 min, subsequent melting curves samples stayed unchanged, reflecting very thermal stability being independent weight.
elsevier.com
sci-hub.se 参考文章(63)
Jian Kang, Bin Wang, Hongmei Peng, Jingping Li, Jinyao Chen, Jinggang Gai, Ya Cao, Huilin Li, Feng Yang, Ming Xiang, Investigation on the dynamic crystallization and melting behavior of β‐nucleated isotactic polypropylene with different stereo‐defect distribution—the role of dual‐selective β‐nucleation agent Polymers for Advanced Technologies. ,vol. 25, pp. 97- 107 ,(2014) , 10.1002/PAT.3210
A. Turner Jones, Jean M. Aizlewood, D. R. Beckett, Crystalline forms of isotactic polypropylene Macromolecular Chemistry and Physics. ,vol. 75, pp. 134- 158 ,(1964) , 10.1002/MACP.1964.020750113
Hongmei Peng, Bin Wang, Jinggang Gai, Jinyao Chen, Feng Yang, Ya Cao, Huilin Li, Jian Kang, Ming Xiang, Morphology and mechanical behavior of isotactic polypropylene with different stereo‐defect distribution in injection molding Polymers for Advanced Technologies. ,vol. 25, pp. 1464- 1470 ,(2014) , 10.1002/PAT.3388
Jian Kang, Bin Wang, Hongmei Peng, Jinyao Chen, Ya Cao, Huilin Li, Feng Yang, Ming Xiang, Investigation on the structure and crystallization behavior of controlled-rheology polypropylene with different stereo-defect distribution Polymer Bulletin. ,vol. 71, pp. 563- 579 ,(2014) , 10.1007/S00289-013-1077-Y
B. Lotz, What can polymer crystal structure tell about polymer crystallization processes European Physical Journal E. ,vol. 3, pp. 185- 194 ,(2000) , 10.1007/S101890070031
D.L Dorset, M.P McCourt, S Kopp, M Schumacher, T Okihara, B Lotz, Isotactic polypropylene, β-phase: a study in frustration Polymer. ,vol. 39, pp. 6331- 6337 ,(1998) , 10.1016/S0032-3861(97)10160-4
G. Strobl, From the melt via mesomorphic and granular crystalline layers to lamellar crystallites: A major route followed in polymer crystallization? European Physical Journal E. ,vol. 3, pp. 165- 183 ,(2000) , 10.1007/S101890070030
Yuzo Yamamoto, Yuichi Inoue, Teruaki Onai, Chikashi Doshu, Hiroshi Takahashi, Hiroki Uehara, Deconvolution analyses of differential scanning calorimetry profiles of β-crystallized polypropylenes with synchronized X-ray measurements Macromolecules. ,vol. 40, pp. 2745- 2750 ,(2007) , 10.1021/MA062784S
Bin Zhang, Jingbo Chen, Jing Cui, Hui Zhang, Fangfang Ji, Guoqiang Zheng, Barbara Heck, Günter Reiter, Changyu Shen, Effect of Shear Stress on Crystallization of Isotactic Polypropylene from a Structured Melt Macromolecules. ,vol. 45, pp. 8933- 8937 ,(2012) , 10.1021/MA3014756
Huihui Li, Xiaoli Sun, Shouke Yan, Jerold M. Schultz, Initial Stage of iPP β to α Growth Transition Induced by Stepwise Crystallization Macromolecules. ,vol. 41, pp. 5062- 5064 ,(2008) , 10.1021/MA702725G