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The effect of even-odd methylene spacer groups on the thermal stability of epoxy-amine polymers
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نویسنده
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shakil m. ,akhter t. ,siddiqi h.m. ,akhtar z.
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منبع
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journal of the chemical society of pakistan - 2015 - دوره : 37 - شماره : 1 - صفحه:92 -98
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چکیده
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A series of some novel epoxy-amine polymers was successfully synthesized by using dgeba and aromatic diamines as starting materials. the cured free standing flexible polymer films were characterized by ftir,dsc,tga,and waxd. the values of tg decreased as the length of the central methylene spacers increased. this decrease in tg values occurred in a zig-zag fashion affirming an even-odd effect. epoxy-amine polymers containing even number of methylene spacers showed remarkably higher tg values as compared to the polymers containing an odd number of methylene spacers. tga analysis revealed that epoxy-amine polymers exhibited thermal stability upto 340 °c. the length of central methylene spacers showed no significant detrimental effect on the degradation temperatures of the polymers. xrd data of epoxy-amine polymers showed their amorphous nature. © 2015,chemical society of pakistan. all rights reserved.
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کلیدواژه
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Amine-epoxy; Epoxy; Even-odd methylene groups; Matrix; Polymer; Thermal stability
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آدرس
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department of chemistry,quaid-i-azam university, Pakistan, department of chemistry,quaid-i-azam university,islamabad,pakistan,department of chemical and biomolecular engineering (bk21+ graduate program),kaist,291 daehak-ro,yuseong-gu, South Korea, department of chemistry,quaid-i-azam university, Pakistan, department of chemistry,quaid-i-azam university, Pakistan
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Authors
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