Study on Functionalization of Isotactic PP with Maleic Anhydride in an Internal Mixer and a Twin-screw Extruder

2003 ◽  
Vol 18 (3) ◽  
pp. 285-290 ◽  
Author(s):  
S. M. Ghahari ◽  
H. Nazokdast ◽  
H. Assempour
Keyword(s):  
Maleic Anhydride ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw ◽  
Internal Mixer

Properties of EPDM/PP thermoplastic vulcanizates produced by an intermeshing-type internal mixer comparing with a co-rotating twin-screw extruder

2019 ◽  
Vol 39 (2) ◽  
pp. 143-151
Author(s):  
Wattana Teppinta ◽  
Banja Junhasavasdikul ◽  
Nattapong Nithi-Uthai
Keyword(s):  
Shear Rate ◽  
Elastic Recovery ◽  
Mechanical Energy ◽  
Cross Linking ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Lower Shear ◽  
Twin Screw ◽  
Lower Shear Rate ◽  
Internal Mixer

Abstract A unique technology for producing thermoplastic vulcanizate (TPV) has been developed using an intermeshing-type internal mixer (ITM). TPV produced by the ITM was compared with that produced using a co-rotating twin screw extruder (Co-TSE) to assess the former’s commercial possibilities. TPV, originating from ethylene-propylene-diene monomer (EPDM) and polypropylene (PP), was produced by both machines with equal filled volumes, same shear rate, and same specific mechanical energy. Results indicate that ITMs can be used to produce TPV with mechanical properties comparable to those of TPV produced by Co-TSE. TPV can be produced with a lower shear rate with ITM compared to Co-TSE. A long residence time can be maintained in the mixing chamber of the ITM, allowing high conversion of the cross-linking reaction and resulting in better elastic recovery properties due to the higher cross-linking density. However, this resulted in higher viscosity of TPV produced by ITM.

Compatibilization Efficiency of Reactively Modified Poly(butylene succinate) as a Compatibilizer for Poly(butylene succinate) Composites

2015 ◽  
Vol 1119 ◽  
pp. 288-291 ◽  
Author(s):  
Vanalee Tansiri ◽  
Pranut Potiyaraj
Keyword(s):  
Thermal Properties ◽  
Maleic Anhydride ◽  
Glycidyl Methacrylate ◽  
Spectroscopic Analysis ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Melt Viscosity ◽  
Butylene Succinate ◽  
Grafting Reactions ◽  
Twin Screw

The modified poly (butylene succinate) (PBS), namely, PBS-g-MA and PBS-g-GMA were prepared in order to be used as a compatibilizer for PBS composites. The grafting of maleic anhydride (MA) or glycidyl methacrylate (GMA) onto PBS was carried out using a twin-screw extruder. The grafting reactions were confirmed by spectroscopic analysis. Comparing with MA, it was found that GMA can be effectively grafted on PBS. The PBS-g-GMA was successfully used for PBS composites to enhance thermal properties. Furthermore, it was found that the incorporation of compatibilizer increased the melt viscosity of PBS composites.

Natural Rubber Based Compatibilizer Prepared in Twin Screw Extruder: Optimization Percentage of Grafted Maleic Anhydride Using Experimental Design

2016 ◽  
Vol 864 ◽  
pp. 13-17 ◽  
Author(s):  
Onny Ujianto ◽  
Marzuki ◽  
Fitri Ayu Radini
Keyword(s):  
Experimental Design ◽  
Maleic Anhydride ◽  
Natural Rubber ◽  
Acid Group ◽  
Ftir Spectra ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Spectra Analysis ◽  
Ring Opening Reaction ◽  
Twin Screw

Maleic anhydride grafted natural rubber compatibilizer was prepared in molten state using twin screw extruder. Amount of maleic anhydride and initiator, as well as screw rotation were varied according to Box-Behnken experimental design. Titration of acid group from the anhydride function and FTIR spectra analysis were carried out as quantitative and qualitative analysis of grafted MA, respectively. The results showed that the percentages of grafted MA for all samples were ranged from 1.31 to 5.36%. The optimum conditions are predicted at 14.4 phr of MA level, 0.41 phr of BPO level, and 71 rpm screw rotation giving 5.39 ± 0.16% of grafted MA. FTIR spectra showed that the MA and carbonyl functional group were found in the compatibilizer suggested the presence of grafted MA and ring opening reaction.

Reactive Blends of Poly(butylene adipate-co-terephthalate) and Thermoplastic Starch

2012 ◽  
Vol 488-489 ◽  
pp. 57-61
Author(s):  
Vorawan Arunyagasemsuke ◽  
Supakij Suttiruengwong ◽  
Manus Seadan
Keyword(s):  
Mechanical Properties ◽  
Weight Ratio ◽  
Cost Effective ◽  
Thermoplastic Starch ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw ◽  
Reactive Blend ◽  
The Cost ◽  
Internal Mixer

The blend of poly(butylene adipate-co-terephthalate) (PBAT) and thermoplastic starch (TPS) are a promising way to get a new class of bio-compostible plastic, balance the cost effective issue and good mechanical properties. Blends of both polymers are immiscible in nature. Therefore, to make the blend to be more compatible, some block-copolymer compatibilizer can be introduced. Reactive blend is one of effective ways to create such compatibilization at the interface. The objective of this work was to study the reactive blends of PBAT/TPS in comparison to the physical blend. The reactive blends were prepared in both an internal mixer and a twin-screw extruder. For reactive blends in twin-screw extruder, PBAT, starch, glycerol and reactive agent were all pre-mixed and blended in an extruder on one step process. The weight ratio of PBAT:TPS (starch + glycerol) was fixed at 60:40. The reactive agent maleic anhydride (MA) and peroxide (Luperox® 101) were used at very low level 0-0.1 phr. The mechanical properties, morphology and flows property of blends were characterized using tensile machine, scanning electron microscope (SEM) and melt flow indexer (MFI). The internal mixer torque showed a decrease in a final torque value of TPS when MA being added, confirming the chain scsision reaction of TPS. The finer morphogy and better mechanical properties were obtained in the reactive blend with 0.1 phr of MA and 0.1 phr of peroxide.

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