摘要
The influences of intramolecular cyclization on the crosslinking reaction processes and the gel′s swelling ratio in polyvinyl alcohol (PVA)-glutaraldehyde(GA) system were studied. The results show that the intramolecular cyclization is a very important factor that has influence on the formation of PVA networks. The lower PVA concentration, the higher intramolecular cyclization degree and higher critical gelation mixing molecular molar ratio of CHO to OH(r_ c ) were obtained . The intramolecular cyclization fractions were increased with the decrease of PVA concentration. Equilibrium swelling ratio decreased with the increase of PVA concentration at the same extent of reaction and the increase of crosslinker concentration at the same PVA concentration. The formation of network can be adjusted with the change of the PVA concentration or the crosslinker concentration.
The influences of intramolecular cyclization on the crosslinking reaction processes and the gel＇s swelling ratio in polyvinyl alcohol （PVA）-glutaraldehyde （GA） system were studied. The results show that the intramolecular cyclization is a very important factor that has influence on the formation of PVA networks. The lower PVA concentration, the higher intramolecular cyclization degree and higher critical gelation mixing molecular molar ratio of CHO to OH（rc） were obtained . The intramolecular cyclization fractions were increased with the decrease of PVA concentration. Equilibrium swelling ratio decreased with the increase of PVA concentration at the same extent of reaction and the increase of crosslinker concentration at the same PVA concentration. The formation of network can be adjusted with the change of the PVA concentration or the crosslinker concentration.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第9期1788-1790,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:20274014)资助
关键词
聚乙烯醇
水凝胶
内环化
临界凝胶点
平衡溶胀度
PVA
Hydrogel
Intramolecular cyclization
Critical gel point
Equilibrium swelling ratio
