Mechanical properties, morphological structure, and thermal behavior of dynamically photocrosslinked PP/EPDM blends

Tang, Longxiang; Qu, Baihua; Shen, Xiaofeng

doi:10.1002/app.20340

Cited by 23 publications

(16 citation statements)

References 21 publications

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“…Blends of iPP and POE demonstrate, in addition to the spherulitic morphol ogy, a crosshatched structure at lower crystallization temperatures [307,308]. Optical micrographs demonstrate the effect of supercooling (or crystallization temperature) on the crystalline structure in the 10/90 iPP/plastomer blend.…”

Section: Impact Performancementioning

confidence: 99%

Rubber–Plastic Blends: Structure–Property Relationship

Datta

2016

Encyclopedia of Polymer Blends

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Blends of rubbers and plastics have both an extensive history and a variety of applications, since blends retain most of the stiffness of thermoplastics and impart some of the resilience and the impact toughness of rubbers. Most useful blends have morphology of rubber dispersed in the thermoplastic matrix since the reverse does not lead to same degree of utility. The properties of these blends depend on the relative ratio of the rubber and the plastic and, more importantly, on the morphology of the dispersion. A very large research effort has been made in an attempt to control and determine the morphology and the interface of the rubber and the plastic as well as understand the effect of the rubber dispersion on the properties of the blend. Blends are important commercially since they allow the development of unique properties from the same constituents with small changes in the relative amounts or the dispersion. The conventional prac tice of blend formation is the melt mixing of the components although, in some cases, a polymerization process that enables the direct production of the binary blend is possible. These direct production processes are efficient since they pro duce the desired morphology and the required polymers in a single step. Blends have become extremely important for the development of polyolefin rubbers and plastics since a large variety can be mixed in a wide composition ratio to produce novel properties. These blends are easily made and have stable dispersion during processing due to only small thermodynamic differences between the various polyolefins compared with engineering thermoplastics. This chapter describes the physics and the chemistry and more importantly the relationship between the structure of the blend and its properties. This area has been continually progressed [1] and reviewed [2]. Progress arises from new materials and new technologies for making rubber-plastic blends. The area of polyethylene blends cited above is an important development. The Encyclopedia of Polymer Blends: Volume 3: Structure, First Edition. Edited by Avraam I. Isayev.

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Section: Impact Performancementioning

confidence: 99%

Rubber–Plastic Blends: Structure–Property Relationship

Datta

2016

Encyclopedia of Polymer Blends

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“…Recently developed dynamically photocross-linked PP/EPDM blends showed improved mechanical properties (25). Especially impact strength was enhanced dramatically due to improved compatibility between PP and EPDM.…”

Section: Effect Of Cross-linking On the Properties Of Pp/epdm Tpvsmentioning

confidence: 99%

“…Tang et al (48) prepared a dynamically photocross-linked PP/EPDM rubber thermoplastic elastomer by exposing the elastomer to UV light while melt mixing in the presence of photoinitiation as well as a cross-linking agent. The effect of dynamic photocross-linking and blend composition on the mechanical properties, morphological structure, and thermal behavior of PP/EPDM blends were investigated.…”

Section: Mechanical and Rheological Propertiesmentioning

confidence: 99%

Polypropylene/Ethylene–Propylene–Diene Terpolymer Blends

Chowdhury

Kim

et al. 2007

Polyolefin Blends

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“…However, its resistance against crack propagation is very low, which somewhat limits its application as a structural material. To overcome this drawback and improve its toughness, most traditional rigid inorganic fillers (RIF) such as glass beads [1,2], CaCO 3 [3], kaolin [4], short glass fibers [5] and many rubbers such as ethylene-propylene-rubber (EPR) [6][7][8][9] and poly(styrene-b-ethylene-copropylene) (SEP) [5] were used to modify PP. However, the incorporation of rubber always leads to the deterioration of strength and hardness [5] though its toughening effect, its dispersion in matrix and its compatibility with matrix are acceptable.…”

Section: Introductionmentioning

confidence: 99%

Phenolic rigid organic filler/isotactic polypropylene composites. I. Preparation

Yang

et al. 2008

Front. Chem. Eng. China

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A novel phenolic rigid organic filler (KT) was melt-mixed with an isotactic polypropylene (iPP) to prepare a series of PP/KT composites, with or without maleic anhydride grafted polypropylene (MAPP) as compatilizer. The evolution of filler morphology during melt-mixing and melt-pressure processes was monitored by scanning electron microscope (SEM) and polarized optical microscope (POM). The influences of shear force, pressure time, filler content and MAPP concentration on the final filler dispersion were studied. We found that this rigid organic filler readily melted and dispersed homogenously into the iPP matrix through a fission-fusion process during the melt-mixing process. Thus a balanced dispersion, which was closely related to shear force and MAPP concentration, can be achieved. During the meltpressure process, parts of the filler particles combined gradually through a coalescence process. However, the incorporation of MAPP can effectively inhibit the tendency to coalesce and refine the filler particles sizes into nanoscale. Thus, a series of PP/KT composites with controllable filler particles size and narrow size distribution can be obtained just by adjusting process conditions and MAPP concentration. In addition, due to the in-situ formation mechanism, the filler phase possessed a typical solid true-spherical shape.

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Mechanical properties, morphological structure, and thermal behavior of dynamically photocrosslinked PP/EPDM blends

Cited by 23 publications

References 21 publications

Rubber–Plastic Blends: Structure–Property Relationship

Rubber–Plastic Blends: Structure–Property Relationship

Polypropylene/Ethylene–Propylene–Diene Terpolymer Blends

Phenolic rigid organic filler/isotactic polypropylene composites. I. Preparation

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