粘接
粘接
점접
2014年
3期
31-35
,共5页
羧基改性聚乙烯醇%水溶性%表观黏度
羧基改性聚乙烯醇%水溶性%錶觀黏度
최기개성취을희순%수용성%표관점도
the carboxyl modified polyvinyl alcohol%water soluble%apparent viscosity
通过丙烯酸（AA）与乙酸乙烯酯（VAc）共聚进而醇解的方法合成出具有高醇解度、低结晶度的丙1烯酸改性聚乙烯醇。通过FT-IR和H-NMR对聚合物的化学结构进行了表征；通过XRD、UV-Vis、剪切流变测试等手段研究了丙烯酸结构单元含量对改性PVA的结晶性能、水溶性能和溶液表观黏度的影响。结果显示，通过引入适量丙烯酸结构单元，可降低PVA结晶度，提高PVA水溶性，增强PVA水溶液表观黏度的剪切稳定性。
通過丙烯痠（AA）與乙痠乙烯酯（VAc）共聚進而醇解的方法閤成齣具有高醇解度、低結晶度的丙1烯痠改性聚乙烯醇。通過FT-IR和H-NMR對聚閤物的化學結構進行瞭錶徵；通過XRD、UV-Vis、剪切流變測試等手段研究瞭丙烯痠結構單元含量對改性PVA的結晶性能、水溶性能和溶液錶觀黏度的影響。結果顯示，通過引入適量丙烯痠結構單元，可降低PVA結晶度，提高PVA水溶性，增彊PVA水溶液錶觀黏度的剪切穩定性。
통과병희산（AA）여을산을희지（VAc）공취진이순해적방법합성출구유고순해도、저결정도적병1희산개성취을희순。통과FT-IR화H-NMR대취합물적화학결구진행료표정；통과XRD、UV-Vis、전절류변측시등수단연구료병희산결구단원함량대개성PVA적결정성능、수용성능화용액표관점도적영향。결과현시，통과인입괄량병희산결구단원，가강저PVA결정도，제고PVA수용성，증강PVA수용액표관점도적전절은정성。
Polyvinyl alcohol (PVA) with high alcoholysis degree but low crystallinity and high water-solubility was achieved by copolymerization of vinyl acetate (VAc) with acrylic acid (AA) and following alcoholysis. The chemical structures of the obtained polymers were characterized by FTIR and 1H NMR. The influence of AA unit on the crystallinity and water solubility of the modified PVA was investigated by XRD, UV-Vis, and the results indicated that high suppression of the crystallization and significant enhancement of the water solubility were achieved through AA modification. Moreover, the rheological investigation suggested that the relative strength of hydrogen bonding interactions existing between PVA chains was enhanced after AA modification, affording the PVA aqueous solution the possibility of withstanding apparent viscosity under a high shear rate.
