1Oalli P, Vecellio G. Technology: Driving Force Behind Inno- vation and Growth ofPolyolefins [J]. Prog Polym Sci, 2001, 26(8): 1287-1336.
2Gahleitner M, Tranninger C, Doshev P. Heterophasic Copo- lymers of Polypropylene: Development, Design Principles, and Future Challenges [J]. JAppl Polym Sci, 2013, 130 (5) : 3028 - 3037.
3Li Rongbo, Zhang Xiuqin, Zhao Ying, et al. New Polypropylene Blends Toughened by Polypropylene/Poly (Ethylene-co-Pro- pylene) in-Reactor Alloy: Compositional and Morphological Influence on Mechanical Properties [J]. Polymer, 2009, 50 (21): 5124-5133.
4Urdampilleta I, Gonzalez A, Iruin J J, et al. Morphology of High Impact Polypropylene Particles [ J]. Macromolecules, 2005, 38(7): 2795-2801.
5Stehling F C, Huff T, Speed C S, et al. Structure and Properties of Rubber-Modified Polypropylene Impact Blends [J].dApplPolymSci, 1981, 26(8): 2693 -2711.
7Cecchin, G, Marehetti E, Baruzzi G. On the Mechanism of Polypropylene Growth over MgCIJTiC14 Catalyst Systems [ J]. MacromolChemPhys, 2001, 202(10) : 1987- 1994.
8Zhou Yong, Niu Hui, Kong Lei, et al. Probing into the Pris- tine Basic Morphology of High Impact Polypropylene Particles [J]. Polymer, 2009, 50 (19) : 4690 - 4695.