桉木质素磺酸钙与接枝共聚引发剂反应导致的结构变化

doi:10.11707/j.1001-7488.20130720

林业科学 ›› 2013, Vol. 49 ›› Issue (7): 136-142.doi: 10.11707/j.1001-7488.20130720

桉木质素磺酸钙与接枝共聚引发剂反应导致的结构变化

甘玲玲, 叶德展, 李骑伶, 张明华, 张熙

四川大学成都 610065

收稿日期:2012-09-28 修回日期:2012-11-13 出版日期:2013-07-25 发布日期:2013-07-23
基金资助:
四川大学高分子材料工程国家重点实验室自主研究课题(GFZ2008005)。

Changes in Calcium Lignosulfonate from Eucalyptus Influenced by Initiators in Graft Copolymerization

Gan Lingling, Ye Dezhan, Li Qiling, Zhang Minghua, Zhang Xi

Sichuan University Chengdu 610065

Received:2012-09-28 Revised:2012-11-13 Online:2013-07-25 Published:2013-07-23

摘要/Abstract

摘要：

为阐明引发剂(H₂O₂-FeCl₂,K₂S₂O₈与H₂O₂-CaCl₂)在桉木质素磺酸钙(HLS-Ca)接枝共聚中的作用,采用差示化紫外、FTIR、UV和特性黏度分析等方法研究上述引发剂对HLS-Ca结构的影响。结果表明: HLS-Ca会与接枝反应体系中的引发剂发生相互作用从而改变HLS-Ca的结构与反应活性。在本文研究条件下,HLS-Ca经Fenton(H₂O₂-FeCl₂)和K₂S₂O₈引发剂处理后苯环结构保持稳定; 酚羟基(Ph-OH)含量降低,但其未被氧化为类醌型结构; 芳基醚键含量增加、黏均分子质量增加。H₂O₂-CaCl₂处理HLS-Ca后,HLS-Ca中Ph-OH含量降低,部分Ph-OH被氧化为羰基; HLS-Ca的苯环结构受到破坏,黏均分子质量降低。

关键词: 引发剂, 桉木质素磺酸钙, 酚羟基, 苯环, 黏均分子质量

Abstract:

The grafting method is widely adopted for developing lignin-based polymer materials with high properties. Aimed at studying various initiators (Fenton, K₂S₂O₈, H₂O₂-CaCl₂) effects on calcium lignosulfonate from eucalyptus (HLS-Ca) in graft copolymerization, HLS-Ca was treated by the above initiators, respectively. Changes in the functional composition of HLS-Ca were investigated by using Difference UV, FTIR, UV spectroscopy and intrinsic viscosity ([η]) methods. The results show that the changes in the structure and reactivity of HLS-Ca were observed due to some certain reactions between it and initiators. Under our experimental conditions, the benzene ring stable against the oxidation of Fenton and K₂S₂O₈ initiators; the content of phenolic hydroxyl (Ph-OH) group decreases under the incubation of Fenton and K₂S₂O₈ initiators though it's not oxidized to the structure like quinone; the content of aryl-ether,[η] and viscosity-average molecular weight (Wη) increase. Under the treatment of H₂O₂-CaCl₂ initiator, the content of Ph-OH group decreases dramatically and it could be transformed to carbonyl structure. The destruction of benzene ring results in the decrease in the [η] and Wη for HLS-Ca.

Key words: initiator, calcium lignosulfonate from eucalyptus, phenolic hydroxyl group, benzene ring, viscosity-average molecular weight

中图分类号:

TQ351.01⁺3

甘玲玲, 叶德展, 李骑伶, 张明华, 张熙. 桉木质素磺酸钙与接枝共聚引发剂反应导致的结构变化[J]. 林业科学, 2013, 49(7): 136-142.

Gan Lingling, Ye Dezhan, Li Qiling, Zhang Minghua, Zhang Xi. Changes in Calcium Lignosulfonate from Eucalyptus Influenced by Initiators in Graft Copolymerization[J]. Scientia Silvae Sinicae, 2013, 49(7): 136-142.

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桉木质素磺酸钙与接枝共聚引发剂反应导致的结构变化

Changes in Calcium Lignosulfonate from Eucalyptus Influenced by Initiators in Graft Copolymerization

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