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A comparison of composition and sequence distribution of p(AM-MADQUAT) prepared by solution and inverse microemulsion polymerization

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Abstract

Acrylamide (AM)/2-(methacryloyloxy)ethyltrimethylammonium chloride (MADQUAT) copolymers were prepared by solution and inverse microemulsion polymerization using ammonium persulfate ((NH4)2S2O8)/sodium hydrosulfite (NaHSO3) as redox initiator at 30 °C. The comonomer reactivity ratios, determined using the Kelen–Tudos (KT) method, were r A = 0.30, r M = 1.31 in solution and r A = 0.63, r M = 1.13 in the inverse microemulsion, respectively. The copolymer microstructure was deduced from the run number and the heterogeneity, based on reactivity ratios. It was found that copolymerization in the inverse microemulsion resulted in close to ideal copolymerization, giving almost random copolymers; copolymerization in solution resulted in some alternating copolymers. The copolymer compositions indicated that high-conversion samples obtained from the inverse microemulsion are much more homogeneous in composition compared with those obtained in solution. It was found that the composition distribution of the copolymer prepared by inverse microemulsion polymerization remained at approximately the feed ratio. The sequence distribution of the copolymer was predicted by first-order Markov statistical and Bernoulli statistical models, respectively. The results showed that the sequence distribution of the copolymer prepared by inverse microemulsion polymerization was almost random, which led to a wider cationic charge distribution and a microstructure that was coincident with the feed ratio.

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Acknowledgements

We acknowledge the financial support given to this work by the Natural Science Foundation of Shanxi Province (20031018) and the Key Technologies Program of Shanxi Province (2006031139).

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China

    Zhang Aiqin, Shen Yinghua, Zhang Xiangying, Han Lingcui & Wang Zhizhong

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  1. Zhang Aiqin
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  2. Shen Yinghua
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  3. Zhang Xiangying
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  4. Han Lingcui
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  5. Wang Zhizhong
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Correspondence to Shen Yinghua.

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Aiqin, Z., Yinghua, S., Xiangying, Z. et al. A comparison of composition and sequence distribution of p(AM-MADQUAT) prepared by solution and inverse microemulsion polymerization. J Polym Res 17, 11–17 (2010). https://doi.org/10.1007/s10965-009-9284-9

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