材料导报
材料導報
재료도보
MATERIALS REVIEW
2009年
14期
33-37,41
,共6页
壳聚糖%L-谷氨酸甲酯%均相接枝%开环聚合
殼聚糖%L-穀氨痠甲酯%均相接枝%開環聚閤
각취당%L-곡안산갑지%균상접지%개배취합
chitosan%methyl L-glutamate%homogeneous graft%ring opening polymerization
对壳聚糖均相接枝L-谷氨酸甲酯产物的结构和性能进行了研究.IR、CP/MAS13CNMR结果表明,谷氨酸甲酯侧链通过酰胺键与壳聚糖结合,形成了梳状接枝产物.XRD谱图中,在2θ=8.3°处出现衍射峰,这是因接入侧链使壳聚糖主链堆砌结构发生改变而引起的.DSC、TG/DTG测试发现,均相接枝物高温一侧吸放热峰的数量与位置有明显改变,并互有不同,反映出结构和接枝量的差异使壳聚糖接枝产物具有不同的热稳定性.
對殼聚糖均相接枝L-穀氨痠甲酯產物的結構和性能進行瞭研究.IR、CP/MAS13CNMR結果錶明,穀氨痠甲酯側鏈通過酰胺鍵與殼聚糖結閤,形成瞭梳狀接枝產物.XRD譜圖中,在2θ=8.3°處齣現衍射峰,這是因接入側鏈使殼聚糖主鏈堆砌結構髮生改變而引起的.DSC、TG/DTG測試髮現,均相接枝物高溫一側吸放熱峰的數量與位置有明顯改變,併互有不同,反映齣結構和接枝量的差異使殼聚糖接枝產物具有不同的熱穩定性.
대각취당균상접지L-곡안산갑지산물적결구화성능진행료연구.IR、CP/MAS13CNMR결과표명,곡안산갑지측련통과선알건여각취당결합,형성료소상접지산물.XRD보도중,재2θ=8.3°처출현연사봉,저시인접입측련사각취당주련퇴체결구발생개변이인기적.DSC、TG/DTG측시발현,균상접지물고온일측흡방열봉적수량여위치유명현개변,병호유불동,반영출결구화접지량적차이사각취당접지산물구유불동적열은정성.
The structure and properties of chitosan homogeneously grafted by methyl L-glutamate are studied. IR and CP/MAS13CNMR results show that the methyl L-glutamate side chains are bonded with chitosan through amide bond to form comb-like graft products. In XRD spectrum, new diffraction peak appearing at 2θ=8. 3° is the result of chitosan main chain structure change caused by the grafted side chains. DSC, TG/DTG testing show that the quantity and location of exothermic peak of homogeneous graft products show more significant changes at high temperature side, and each is different, reflecting that chitosan graft products have different thermal stability because of different structure and the grafting number.
