工程塑料应用
工程塑料應用
공정소료응용
ENGINEERING PLASTICS APPLICATION
2014年
5期
1-6
,共6页
聚丁二酸丁二酯%酰亚胺二元酸%热性能%拉伸性能%酶降解性
聚丁二痠丁二酯%酰亞胺二元痠%熱性能%拉伸性能%酶降解性
취정이산정이지%선아알이원산%열성능%랍신성능%매강해성
poly(butylene succinate)%imide dihydric alchohol%thermal property%tensile property%enzymatic degradation
先以均苯四甲酸酐和氨基乙酸为原料合成了一种新的酰亚胺二元酸(IDA)，接着用丁二酸、丁二醇与IDA采用熔融缩聚法合成了一系列含酰亚胺结构的聚合物。通过红外光谱图、核磁共振氢谱图确定了IDA及聚合物的分子结构，通过差示扫描量热仪、热重分析仪测试分析了聚合物的热性能，采用X射线衍射表征了聚合物的结晶性能，利用含脂肪酶的磷酸盐缓冲溶液测试了聚合物的酶降解性能，此外还测试了聚合物薄膜的拉伸性能。实验结果表明，随着IDA的加入，聚合物的熔点降低，热分解温度变化不大，结晶度下降，拉伸强度降低，断裂伸长率增加，酶降解性明显提高。
先以均苯四甲痠酐和氨基乙痠為原料閤成瞭一種新的酰亞胺二元痠(IDA)，接著用丁二痠、丁二醇與IDA採用鎔融縮聚法閤成瞭一繫列含酰亞胺結構的聚閤物。通過紅外光譜圖、覈磁共振氫譜圖確定瞭IDA及聚閤物的分子結構，通過差示掃描量熱儀、熱重分析儀測試分析瞭聚閤物的熱性能，採用X射線衍射錶徵瞭聚閤物的結晶性能，利用含脂肪酶的燐痠鹽緩遲溶液測試瞭聚閤物的酶降解性能，此外還測試瞭聚閤物薄膜的拉伸性能。實驗結果錶明，隨著IDA的加入，聚閤物的鎔點降低，熱分解溫度變化不大，結晶度下降，拉伸彊度降低，斷裂伸長率增加，酶降解性明顯提高。
선이균분사갑산항화안기을산위원료합성료일충신적선아알이원산(IDA)，접착용정이산、정이순여IDA채용용융축취법합성료일계렬함선아알결구적취합물。통과홍외광보도、핵자공진경보도학정료IDA급취합물적분자결구，통과차시소묘량열의、열중분석의측시분석료취합물적열성능，채용X사선연사표정료취합물적결정성능，이용함지방매적린산염완충용액측시료취합물적매강해성능，차외환측시료취합물박막적랍신성능。실험결과표명，수착IDA적가입，취합물적용점강저，열분해온도변화불대，결정도하강，랍신강도강저，단렬신장솔증가，매강해성명현제고。
A series of high molecular weight poly(butylene succinate) and its copolyester containing rigid imide units were synthesized.The chemical structure and composition of the copolyesters were determined by 1H-NMR spectroscopy and Fourier transform infrared spectroscope.The thermal properties,crystallization behavior and mechanical properties of polymers were investigated using differential scanning calorimetry,X-ray diffraction,thermogravimetric analysis and mechanical properties testing. The enzymatic degradation was investigated using pancreatic lipase solution.The results show that the melting temperature and the relative degree of crystallinity of the copolyester decrease with the increment in pyromellitic imide unit content.However,the thermal degradation temperature (5% decomposition temperature) changes little.The mechanical properties testing shows that the tensile strength has a trend of decrease,but the elongation at break is improved with the increment in imide units.Meanwhile,the enzymatic degradation rate of poly (butylene succinate) is enhanced.
