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Study on the Modification of MMT and Its Impact on the Stability of Polyethylene

Author: YuanDaoSheng
Tutor: LiangXingQuan
School: Guangxi University
Course: Applied Chemistry
Keywords: Montmorillonite Organic montmorillonite Polyethylene PE / O - MMT composite materials Photodegradation
CLC: TB332
Type: Master's thesis
Year: 2008
Downloads: 192
Quote: 1
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Abstract


This paper studies the natural montmorillonite sodium , organically modified process conditions , and characterized by IR, XRD and other equipment before and after the natural sodium montmorillonite and organically modified structural changes ; melt intercalation were prepared poly ethylene / organic montmorillonite ( PE / O - MMT ) composite materials. Intrinsic viscosity , scanning electron microscopy (SEM) polyethylene / organic montmorillonite ( PE / O - MMT ) composite sample degradation characteristics of photo-oxidation of the film under the accelerated aging experiments . The main conclusions are as follows: 1 . Sodium carbonate , sodium agent natural montmorillonite sodium . The experimental results show that : when the dosage of sodium montmorillonite 6% , the reaction temperature is 70 ° C , the reaction time was 2 h , and a pulp density of 10% , sodium is best . The sodium montmorillonite expansion capacity , cation exchange capacity by ore of 8 mL / g , respectively , 58.5 mmol/100g increased to 45.5 mL / g , 116.5 mmol/100g . The X diffraction analysis showed that the smectite d ( 001 ) plane from the original value of 1.543 nm was changed to 1.251 nm . 2 -dodecyl betaine amphoteric surfactants as organic modifier organically modified montmorillonite (MMT) , it becomes an organic montmorillonite ( O - MMT ) . The experimental results showed that : when the molar ratio of organic modifier and the cation exchange capacity of the sodium montmorillonite was 1.5:1 and the reaction temperature is 70 ° C , the reaction time was 6 h , the organic modification effect is significant. Organic montmorillonite sedimentation volume , oil absorption by sodium montmorillonite 2.2 mL / g , 0.4501 g / g to improve to 3.6 mL / g, 0.7837 g / g. IR, XRD organic montmorillonite structural characterization . 3 . The melt intercalation prepared polyethylene / organic montmorillonite ( PE / O - MMT ) composite materials. Intrinsic viscosity analysis of different levels of organic modified montmorillonite polyethylene / organic montmorillonite ( PE / O - MMT ) composite sample film in artificial light degradation characteristics under accelerated aging experiments and analyzed by scanning electron microscopy organic montmorillonite soil content of 0 % and 4% polyethylene / organic montmorillonite ( PE / O - MMT ) composite film surface morphology . The results showed that the organic modified montmorillonite ( O - MMT ) can effectively improve the light stability to degradation of the polyethylene .

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