Journal ArticleDOI
Structure and properties of polypropylene/poly(ethylene-co-propylene) in-situ blends synthesized by spherical Ziegler–Natta catalyst
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TLDR
A polypropylene/poly(ethylene- co-propylene) (iPP/EPR) in-situ blend synthesized by spherical Ziegler-Natta catalyst was fractionated by temperature-gradient extraction fractionation as discussed by the authors.About:
This article is published in Polymer.The article was published on 2001-06-01. It has received 166 citations till now. The article focuses on the topics: Ziegler–Natta catalyst & Ethylene propylene rubber.read more
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Phase morphology and impact toughness of impact polypropylene copolymer
TL;DR: In this article, the impact toughness of two impact polypropylene copolymers (IPC) with almost the same ethylene content, molecular weight and molecular weight distribution were studied by temperature gradient extraction fractionation (TGEF), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR) and differential scanning calorimetry (DSC).
Journal ArticleDOI
Morphology, microstructure and compatibility of impact polypropylene copolymer
Chunhui Zhang,Chunhui Zhang,Yonggang Shangguan,Yonggang Shangguan,Ruifen Chen,Ruifen Chen,Yuanzhi Wu,Yuanzhi Wu,Feng Chen,Feng Chen,Qiang Zheng,Qiang Zheng,Guo-Hua Hu,Guo-Hua Hu +13 more
TL;DR: In this paper, the morphology of impact polypropylene copolymer (IPC) was studied through scanning electron microscope (SEM) and transmission electron microscopy (TEM) observation, and a modified dispersed phase model with core-shell structure was proposed.
Journal ArticleDOI
Multidimensional Analysis of the Complex Composition of Impact Polypropylene Copolymers: Combination of TREF, SEC-FTIR-HPer DSC, and High Temperature 2D-LC
TL;DR: In this article, a new multidimensional fractionation technique, temperature rising elution fractionation (Tthis article) combined with high temperature size exclusion chromatography FTIR (HT-SEC-FTIR), high speed or high performance differential scanning calorimetry (HPer DSC) is used for the comprehensive analysis of a commercial impact polypropylene copolymer.
Journal ArticleDOI
Regulation of morphology and mechanical properties of polypropylene/poly(ethylene-co-propylene) in-reactor alloys by multi-stage sequential polymerization
Qi Dong,Xiaofeng Wang,Zhisheng Fu,Zhisheng Fu,Jun-Ting Xu,Jun-Ting Xu,Zhiqiang Fan,Zhiqiang Fan +7 more
TL;DR: In this article, a series of polypropylene/poly(ethylene-co-propylene) (PP/EPR) in-reactor alloys were synthesized by the homopolymerization of propylene in the first stage, after that it switches to gas-phase ethylene−propylene copolymerization and gas phase hompolymerization in a circular mode.
Journal ArticleDOI
Heterophasic Copolymers of Polypropylene: Development, Design Principles, and Future Challenges
TL;DR: A review of polypropylene impact copolymers can be found in this paper, where an overview of the application range is presented together with a glimpse into the future of this material class.
References
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Journal ArticleDOI
Structure and properties of rubber-modified polypropylene impact blends
TL;DR: In this paper, the state of dispersion of poly(ethylene-co-propylene) (PEP) rubber and high-density polyethylene (HDPE) in polypropylene (PP) blends was investigated using scanning electron microscopy to examine solvent-etched microtomed surfaces cut at low temperatures.
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Melt rheology, phase structure and impact properties of injection-moulded samples of isotactic polypropylene/ethylene-propylene copolymer (iPP/EPR) blends: influence of molecular structure of EPR copolymers
TL;DR: In this paper, the influence of the melt phase viscosity ratio μ in determining the average particle size of the EPR phase in the vicinity of the minimum expected according to the Taylor-Tomotika theory was investigated.
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Polypropylene/ethylene-co-propylene blends: influence of molecular structure and composition of EPR on melt rheology, morphology and impact properties of injection-moulded samples
TL;DR: In this paper, the influence of EPR molecular structure and composition on the melt rheology, on the mode and state of dispersion of the minor component in the melt as well as in the solid state and on the impact properties of injection-moulded samples was investigated.
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Structure and properties of impact copolymer polypropylene. I. Chain structure
TL;DR: In this article, impact copolymer polypropylene (ICPP) was fractionated into four fractions and the 4 fractions were studied using Fourier transform infrared and 13C nuclear magnetic resonance analysis.
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Structure and properties of impact copolymer polypropylene. II. Phase structure and crystalline morphology
TL;DR: In this article, an impact copolymer polypropylene (ICPP) was separated into 4 fractions, A, B, C, and D. The phase structure, thermal behavior, and crystalline morphology of the ICPP and its 4 fractions were studied thoroughly using scanning electron microscopy (SEM).