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Synthesis and Properties of Maleic Anhydra Grafted Poly(Ethylene 1-Octene) Copolymers Viasolvothermal Process

Author: LiuQiaoChu
Tutor: QiZuoZuo
School: Shanghai Jiaotong University
Course: Polymer Physics and Chemistry
Keywords: Solvothermal synthesis Ethylene - octene copolymer Maleic anhydride Grafting reaction Performance
CLC: O631.3
Type: Master's thesis
Year: 2007
Downloads: 251
Quote: 6
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Abstract


The first attempt using the solvothermal synthesis prepare maleic anhydride (MAH) grafted copolymer of an ethylene - octene copolymer (POE) . IR and H NMR analysis confirmed the MAH has been successfully grafted onto the POE skeleton . By the measurement of the graft ratio and the gel fraction of the product , a detailed examination of the amount of monomer MAH initiator agent DCP content , polymer concentration , reaction time , reaction temperature and the influence of the different solvents on the grafting reaction . The results show that : With MAH content , DCP content , the increase of the concentration and reaction temperature , graft rate of first rise and reach a maximum value after drop phenomenon ; With prolonged reaction time , grafting the first to rise rapidly , then slowly increase . The gel fraction is increased with the MAH content increases to a maximum value and then decreases with increasing the content of MAH ; With DCP content and increase of the concentration , the gel will remain raised until close to 100% ; addition for the formulations used in the study , the reaction temperature and reaction time on the gel is not too much impact, the the product gel rate could be maintained at a lower level ( LT ; 10 % ) . Is worth noting that : Solvothermal Synthesis in a good solvent and a poor solvent POE graft copolymer can be prepared , even in the poor solvent ( chloroform ) can get higher grafting rate ( 1.55% ) product , excellent description of the method than the traditional method of solution ; while high grafting yield (10.85 %) and low gel ( 12.49% ), POE-g-MAH by the Act in a good solvent reaction than the melting method can obtain a product of grafting rate (lt; 2.5%) is much higher. Past graft research work in the POE-g-MAH grafting rate is very low , so the performance of the grafted material matrix or less , and the the graft product performance involves less . In our experiments can be obtained such a high grafting rate PoE - g -MAH , which is bound to cause the change of the material properties , and therefore study a different graft rate product performance changes is very important . Therefore, we

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Polymer physics and physical chemistry of polymers > The chemical nature of polymers
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