Realizing simultaneous reinforcement and toughening in polypropylene based on polypropylene/elastomer via control of the crystalline structure and dispersed phase morphology

RSC Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 1313-1323 ◽  
Author(s):  
Jianfeng Wang ◽  
Hong Wu ◽  
Shaoyun Guo
Keyword(s):  
Crystalline Structure ◽  
Phase Morphology ◽  
Dispersed Phase ◽  
Reinforcement And Toughening

Realizing simultaneous reinforcement and toughening in polypropylene based on polypropylene/elastomer via controlling crystalline structure and dispersed phase morphology.

The role of dispersed phase morphology on toughening of epoxies

Polymer ◽  
1997 ◽  
Vol 38 (1) ◽  
pp. 21-30 ◽  
Author(s):  
Julie Y. Qian ◽  
Raymond A. Pearson ◽  
Victoria L. Dimonie ◽  
Olga L. Shaffer ◽  
Mohamed S. El-Aasser
Keyword(s):  
Phase Morphology ◽  
Dispersed Phase

Effect of Epoxide Group in Thermoplastic Elastomer on the Properties of Polyamide6 and Low-Density Polyethylene Blends

2014 ◽  
Vol 979 ◽  
pp. 143-146 ◽  
Author(s):  
Surakit Tuampoemsab ◽  
Saad Riyajan ◽  
Thritima Sritapunya ◽  
Pornsri Pakeyangkoon
Keyword(s):  
Impact Strength ◽  
Natural Rubber ◽  
Shear Viscosity ◽  
Thermoplastic Elastomer ◽  
Phase Morphology ◽  
Epoxidized Natural Rubber ◽  
Low Density Polyethylene ◽  
Dispersed Phase ◽  
Low Density ◽  
Epoxide Group

Studies on the effect of percentages of epoxide group in thermoplastic elastomer as a compatibilizer on properties of polyamide6 (PA6) and low-density polyethylene (LDPE) blends was successfully carried out in this study. Thermoplastic epoxidized natural rubber (TPENR), made from epoxidized natural rubber (ENR) and LDPE, prepared from 3 types of ENR, i.e., ENR-20, ENR-50 and ENR-70, with the ratio of 90/10 of LDPE/ENR by weight. TPENR was applied as a compatibilizer into the blend of PA6/LDPE/TPENR at the ratio by weight of 80/20/1 by using a twin screw extruder at 235°C. All test specimens were characterized for phase morphology, impact strength and rheological behaviour. Results exhibited that phase morphology of PA6/LDPE blend was incompatible. The addition of TPENR improved the compatibility of PA6/LDPE blends. With inclusion of TPENR-20 as a compatibilizer, the uniformity and the maximum reduction of dispersed phase sized were observed. Moreover, it was revealed that the rheological properties such as shear viscosity increased when compared with PA6/LDPE incompatible blend. In addition, it was found that the highest shear viscosity and also the highest impact strength were obtained for the blend of PA6/LDPE compatibilized by TPENR-20. This result was further supported by SEM images, which showed that the smallest dispersed phase size occurred when a TPENR-20 was used as a compatibilizer. So, it was clearly demonstrated in this study that the suitable type of TPENR, i.e., TPENR-20, has an effect on improving phase morphology and properties of PA6/LDPE blends.

Processing/Structure/Properties Relationships in Polymer Blends for the Development of Functional Polymer Foams

2015 ◽  
Author(s):  
Ali Rizvi ◽  
Chul B. Park
Keyword(s):  
Strain Hardening ◽  
Elastic Properties ◽  
Crystallization Kinetics ◽  
Extensional Flow ◽  
Relaxation Times ◽  
Rheological Behaviour ◽  
Polymer Processing ◽  
Phase Morphology ◽  
Dispersed Phase ◽  
Carbon Dioxide Co2

In this study we present a comprehensive experimental investigation of the effect of polymer blending on the dispersed phase morphology and how the dispersed phase morphology influences the foaming behavior of the semicrystalline polymer matrix using three different material combinations: polyethylene (PE)/polypropylene (PP), PP/polyethylene terephthalate (PET) and PP/polytetrafluoroethylene (PTFE). Samples are prepared such that the dispersed phase domains exhibit either spherical or fibrillated morphologies. Measurements of the uniaxial extensional viscosity, linear viscoelastic properties and crystallization kinetics under ambient pressures and elevated pressures of carbon dioxide (CO2) are performed and the morphological features are identified with the aid of SEM. Batch foaming and lab-scale extrusion foaming experiments are performed, as a screening model for polymer processing, to show the enhancement of the foaming ability as a result of the blend morphology, taking into account the rheological behaviour and the effects of crystallization kinetics. The formation of high aspect ratio fibrils imparts unique characteristics to the semicrystalline matrix such as strain-hardening in uniaxial extensional flow, prolonged relaxation times, pronounced elastic properties and enhanced kinetics of crystallization. In contrast, the regular blends containing spherical dispersed phase domains do not exhibit such properties. Foam processing of the three blends reveals a marked broadening of the foaming window when the dispersed phase domains are fibrillated due to the concurrent increase in crystallization kinetics, improved elastic properties and strain hardening in extensional flow.

Co-Continuous PPS/PA66 Composites - Part I: Phase Morphology and Structure

2013 ◽  
Vol 804 ◽  
pp. 98-101
Author(s):  
Tao Yin ◽  
Yu Qi Gu ◽  
Jie Hua Gao ◽  
Wen Yue Yu
Keyword(s):  
Electron Microscopy ◽  
Continuous Phase ◽  
Phase Morphology ◽  
Dispersed Phase ◽  
Polyamide 66 ◽  
Screw Extruder ◽  
Wide Range ◽  
Morphology And Structure ◽  
Twin Screw ◽  
Scanning Electron

Poly (phenylene sulfide) (PPS) was blended with polyamide 66 (PA66) in a wide range of compositions by using a co-rotating twin-screw extruder. Scanning electron microscopy and solvent extraction were employed to detect phase morphology of PPS/PA66 composites. The results demonstrated that the phase morphology of PPS/PA66 composites changed from PA66 dispersed phase in PPS matrix to co-continuous phase, and then PPS dispersed phase in PA66 matrix with the increase of PA66 content.

Effect of compounding procedure on mechanical properties and dispersed phase morphology of poly(lactic acid)/polycaprolactone blends containing peroxide

2006 ◽  
Vol 103 (2) ◽  
pp. 1066-1074 ◽  
Author(s):  
Takeshi Semba ◽  
Kazuo Kitagawa ◽  
Umaru S. Ishiaku ◽  
Masaya Kotaki ◽  
Hiroyuki Hamada
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Phase Morphology ◽  
Poly Lactic Acid ◽  
Dispersed Phase

Dispersed phase morphology and fractionated crystallization of high-density polyethylene in PET/HDPE blends

2008 ◽  
Vol 2 (1) ◽  
pp. 15-24 ◽  
Author(s):  
Souad Mbarek ◽  
Mohamed Jaziri ◽  
Yvan Chalamet ◽  
Boubaker Elleuch ◽  
Christian Carrot
Keyword(s):  
High Density Polyethylene ◽  
Phase Morphology ◽  
High Density ◽  
Dispersed Phase ◽  
Fractionated Crystallization

Correlation between the Interfacial Tension and Dispersed Phase Morphology in Interfacially Modified Blends of LLDPE and PVC

1999 ◽  
Vol 32 (5) ◽  
pp. 1637-1642 ◽  
Author(s):  
H. Liang ◽  
B. D. Favis ◽  
Y. S. Yu ◽  
A. Eisenberg
Keyword(s):  
Interfacial Tension ◽  
Phase Morphology ◽  
Dispersed Phase

Formation of high-density polyethylene–poly(ethylene-octene) core–shell particles in recycled poly(ethylene terephthalate) by reactive blending

2019 ◽  
Vol 35 (3) ◽  
pp. 117-137
Author(s):  
Yongjun Liu ◽  
Ming Zhong ◽  
Gang Liu ◽  
Shouzhi Pu
Keyword(s):  
Mechanical Properties ◽  
High Density Polyethylene ◽  
Ethylene Terephthalate ◽  
Phase Morphology ◽  
High Density ◽  
Dispersed Phase ◽  
Core Shell ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Shell Particles

Recycled poly(ethylene terephthalate) (R-PET)/high-density polyethylene (HDPE)/glycidyl methacrylate grafted poly(ethylene-octene) (mPOE) blends, in which the binary (HDPE/mPOE) dispersed phase was of a HDPE core-mPOE shell structure, were prepared. For this purpose, HDPE-g-mPOE graft copolymers were prepared in HDPE/mPOE blends via reactive extrusion with the presence of the free radical initiator dicumyl peroxide (DCP). Then, R-PET was blended with the HDPE/mPOE blends by melt extrusion. The effect of the DCP and mPOE content in the HDPE/mPOE blends on the phase morphology and mechanical properties of the R-PET/HDPE/mPOE blends were studied systematically. It was found that the blends containing reactive compatibilizer exhibited the encapsulation of the HDPE by the mPOE, forming core–shell particles dispersed phase morphology. The graft chains of HDPE-g-mPOE-g-PET formed by the in situ reaction between R-PET and mPOE phases reduced the interfacial tension. Consequently, the dispersed phase morphology was observed to form smaller diameter core–shell particles. The resultant blends exhibited an effect on both the thermal and mechanical properties. Differential scanning calorimetric analysis showed the dispersed phase particles could act as a nucleating agent in the R-PET matrix to improve the crystallization temperature, while the graft copolymers formed in the compatibilized R-PET/HDPE/mPOE blend decreased the nucleation activity. Notched Charpy impact strength and elongation at break of the R-PET were improved by forming the core–shell particles dispersed phase morphology.

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