Natural Rubber and Bio-based Thermoplastic Elastomer

2020 ◽  
pp. 241-254
Author(s):  
Wei Jiang
Keyword(s):  
Natural Rubber ◽  
Thermoplastic Elastomer

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.

Compatibilization of natural rubber–polypropylene thermoplastic elastomer blend

2019 ◽  
Vol 52 (8) ◽  
pp. 728-746 ◽  
Author(s):  
Abderrahmane Belhaoues ◽  
Samia Benmesli ◽  
Farid Riahi
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Morphological Analysis ◽  
Thermoplastic Elastomer ◽  
Homogeneous Distribution ◽  
Molten State ◽  
Rotor Speed ◽  
Elongation At Break ◽  
Compatibilizing Agent ◽  
Elastomer Blend

The effects of the addition of epoxidized natural rubber/maleic anhydride-grafted polypropylene blend as a compatibilizing agent (CA) on the properties of natural rubber (NR)/polypropylene (PP) thermoplastic elastomer blend were studied. The blends were prepared in the molten state at 180°C using a Brabender Plasticorder at a rotor speed of 60 r min−1. Evidence of compatibilization was obtained from the Brabender plastograms and from the mechanical properties results as well as the morphological analysis. It was found that the addition of the CA at different contents resulted in an increase of the tensile strength and Young’s modulus and a decrease of the elongation at break. It was also found that the melting temperature remained unchanged, the % crystallinity decreased, but the thermal stability was not affected. The morphology revealed a more homogeneous distribution of the dispersed PP phase for the CA-containing systems compared to the control NR/PP blend. These effects were attributed to the interactions that developed with the blend constituents through the functional groups of the CA.

Effect of particulate fillers on natural rubber/high-density polyethylene blends for roofing application

2020 ◽  
pp. 096739112093461
Author(s):  
WVWH Wickramaarachchi ◽  
S Walpalage ◽  
SM Egodage
Keyword(s):  
Impact Strength ◽  
Natural Rubber ◽  
High Density Polyethylene ◽  
Thermoplastic Elastomer ◽  
Cost Effective ◽  
Barium Sulphate ◽  
Filler Loading ◽  
High Density ◽  
Melt Mixing ◽  
Excellent Property

Blending of two or more polymers generates a new material, which is more cost-effective than a newly synthesised material. Blending-type thermoplastic elastomer (TPE) is produced by melt-mixing of a thermoplastic with a rubber. These blends have high demands associated with excellent property combinations of the parent materials. Particulate fillers are used in the rubber and plastic industry for property modification and cost reduction. In this work, six particulate fillers, namely, calcium carbonate, barium sulphate (BaSO4), kaolin, talc, Snobrite clay and dolomite were used to develop natural rubber (NR)/high-density polyethylene (HDPE) TPE blends, and the most suitable filler for roofing application was identified. A series of NR/HDPE 20/80 blends were prepared by varying filler loading from 10 phr to 30 phr at 10 phr intervals using a Plasticorder. Mechanical properties, such as tensile strength, hardness, impact strength and tear strength, and gel content of the blends were investigated. The addition of talc, dolomite and kaolin to NR/HDPE blend showed reduced impact strength, which is the most important property for a roofing application. The other three fillers showed improved impact strength at specific loadings. The blend with 30 phr of BaSO4 was identified as the best blend, as per the overall performance.

DYNAMICALLY VULCANIZED THERMOPLASTIC ELASTOMER BLENDS OF NATURAL RUBBER AND POLYPROPYLENE

2004 ◽  
Vol 53 (2) ◽  
pp. 143-156 ◽  
Author(s):  
Farid Riahi ◽  
Djafer Benachour ◽  
Abdelmalek Douibi
Keyword(s):  
Natural Rubber ◽  
Thermoplastic Elastomer

Effect of Volume Plasticizers on the Thermal Performance of Tacca leontopetaloides Starch Biopolymer

2013 ◽  
Vol 594-595 ◽  
pp. 882-886 ◽  
Author(s):  
Nurul Shuhada Mohd Makhtar ◽  
Ainatul Mardhiah Mohd Amin ◽  
Nur Farzana Abdul Ghafar ◽  
Nur Shahidah Ab Aziz ◽  
Miradatul Najwa Muhd Rodhi ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Fourier Transform ◽  
High Temperature ◽  
Natural Rubber ◽  
Thermal Performance ◽  
Thermoplastic Elastomer ◽  
Crude Palm Oil ◽  
Thermogravimetric Analyzer ◽  
Roll Mill ◽  
Olein Oil

The effect of 10, 30 and 50 % volume of Olein oil, Glycerol and Crude Palm Oil (CPO) as plasticizer on the thermal performance of biopolymer has been investigated in this paper. The biopolymer was developed from a new source of starch,Tacca leontopetaloides, and natural rubber by using two roll-mill. Changes in functional groups and thermal performance of formulated bio-Thermoplastic elastomer (TPE) were analyzed by Fourier Transform Infrared (FTIR) and Thermogravimetric Analyzer (TGA). Increased volume of Olein oil and glycerol resulted to increasing strength of hydrogen bonding in the intermolecular TPEs, therefore it has high thermal resistant towards high temperature. Conversely, increased volume of CPO decreased the strength of hydrogen bonding in structural starch and CPO therefore TPE with CPO shows high degradability which possess up to 100 % weight reduction at 500 0C.

scholarly journals A review on graft compatibilizer for thermoplastic elastomer blend

2021 ◽  
Vol 2080 (1) ◽  
pp. 012003
Author(s):  
K.K. Nitiyah ◽  
Luqman Musa ◽  
M.S.M. Rasidi ◽  
Shayfull Zamree Abd Rahim ◽  
Rozyanty Rahman ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Natural Rubber ◽  
Thermoplastic Elastomer ◽  
Synthetic Polymers ◽  
The Other ◽  
Poly Lactic Acid ◽  
Melt Blending ◽  
Internal Mixer ◽  
The Impact ◽  
Elastomer Blend

Abstract A biodegradable thermoplastic elastomer (TPE) blend is developed by blending poly (lactic acid) (PLA) and natural rubber (NR) or epoxidized natural rubber (ENR) and it is a sustainable substitution in recent years for synthetic polymers. PLA is high in mechanical strength and compostable, but it is highly stiff and brittle. The incorporation of NR or ENR to PLA increases the impact strength and toughness of PLA. However, the disparity in polarity between PLA and elastomer phase like NR and ENR results in TPE blend being incompatible. Hence, compatibilization is essential to improve its polarity and develop interactions. Compatibilizer that composed of two different polymer is known is graft compatibilizer with the aid of grafting agent. The graft compatibilizers are divided into two categories. The first type is made up of one polymer and grafting agent and, the other one is composed of two polymer groups and grafting agent. These two types of graft compatibilizer can be prepared via two different method such as direct melt blending and solution. Apart from this, the TPE blend is produced via the melt blending technique with mixing machines such as internal mixer and extruder. This article has reviewed the preparation of the graft compatibilizer and blending technique of TPE. Based on the findings, the graft compatibilizers has a significant role in improving miscibility and compatibility across blend composed of different phase.

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