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Study on the Moisture Absorption Properties of Poly[acrylate-co-methacrylate] Chunxiao ZHANG1, Fuchen BAI2, Xiyao ZHANG1, Jian LIU 1, Wanxi ZHANG1 1 College of Materials Science and Engineering,Jilin University,Changchun, 130025 2 Changchun Institute of Applied Chemistry Chinese Academy of Sciences,Changchun, 130022 Key Words: Moisture absorption;Poly [acrylate-co-methacrylate]; Copolymerization.
If the moisture can't get controlled,it will have seriously influence on the quality of the product during the production in precision apparatuses, measurement instrument,electronics and chemistry.
Only a small part form gel state and most of them become viscous.The product, which shows better water-absorbent ,low strength after moisture-absorption and reduction in moisture absorbency ,can't form valid three dimensional network structure .It's benefit for the period initiated by free radical under high temperature.But high temperature leads to fast speed,which will induce explosive polymerization and increase the difficulty in controlling the reaction.The resulting polymer has low humidity-absorbency.

In virtue of its complex structure, lignocellulose is remarkably resistant to both chemical and microbial attacks; therefore, the main barrier for its widespread utilization is the difficulty in its hydrolysis [1].
Green Chemistry. 2010, p. 338 [5] H Zhao, G.
Green Chemistry. 2008, p. 696 [6] H Zhao, C L.

Investigation of a Microwave Absorbing Material Based on NBR Yongqing Yang* Department of Materials Chemistry, College of Chemistry and Chemical Engineering, Ningxia University, YinChuan 750021, China Keywords: Microwave absorbing property; Microstructure; Nanocomposites; Mechanical Property; Rubber Abstract.
NBR is a light brown elastomer and contains a lot of strong polar groups -CN in its molecular structure [4-6].

Preparation of Cationic Rice Husk Flocculant and its flocculating characteristics Yinghuan Fu1, a, Chenglin Lin1, b, Lifeng Chen1, c, Yu Song1, d, Hongchao Ma1, e 1School of Chemistry Engineering & Material, Dalian Polytechnic University,Dalian 116034, Liaoning China afuyinghuan@sina.com Keywords: rice husk; natural polymer; cationic flocculant Abstract Natural polymer cationic flocculant was prepared by introducing quaternary ammonium group into the rice husk molecules, using potassium permanganate as initiator.
Furthermore, temperature is excessively high so as to destroy the structure of macromolecule chain, the stability of product deterioration, so that influent flocculent capacity.
Wang, in: Master's Thesis in Guangzhou Institute of Chemistry, CAS, in Chinese

There are many channels and holes in the structure whose inner surface is very large.
References [1] Maskazu A: Pure & Applied Chemistry.
:Environmental Chemistry, Vol.22(2003),p.59 [15] Li B., Ning P., Chen Y.B., et al.

For helium gas is transparent to neutrons can be calculated model ignores the effect of helium , and helium in proportion to the volume of the steel structure of the material is set to 7.58 density .
Jónsson, in: Theoretical Methods in Condencsed Phase Chemistry, edited by S.D.
Schwartz, volume 5 of Progress in Theoretical Chemistry and Physics, chapter, 10, Kluwer Academic Publishers (2000)

Introduction 1,5-diazabicyclo[4.3.0]non-5-ene(DBN) is a strong organic base which is similar to 1,8-diazabicyclo[5.4.0]undee-7-ene(DBU)[1,2] in structure and property, DBN can be applied to a variety of chemical reactions such as elimination, isomerization, condensation and esterification.
[5] Liu Xingquan, Jia Zhaoxia, Wu Yutang: Synthetic chemistry, Vol. 1 (1993), P. 53-60
[6] Lin Jun, Cheng Xiaohong, Liu Fuchu: Synthetic chemistry, Vol. 1(1994), P. 37-41

Chemistry and Materials Department, Naval University of Engineering, Wuhan 430033, China aemail: wenqingzhen8@sina.com, bemail: add1984@sina.com, cemail:zhujinhua@163.com, Key words: neoprene, aging, toughness and strength, service life prediction Abstract.
Introduction Neoprene represent a large family of polymers with many applications, including coatings and adhesives, foams, tires, inflatable structures, conveyor belts, protective coverings, biomaterials, ships and national defence, for their excellent weather-resistant and heat-resistant.
Chemistry & Bioengineering, 2006, 23(6): 1-4.

Effect of exogenous galactose on EPS production during bioleaching of pyrite by Acidithiobacillus ferrooxidans Beatriz Pavez1,a, Albert Saavedra2,b, Mauricio Díaz3,c, Juan Carlos Gentina2,d. 1Institute of Chemistry, Pontificia Universidad Católica de Valparaíso, Chile. 2School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso, Chile. 3Institute of Biotechnology, Universidad Mayor, Santiago, Chile.
EPS make up the intercellular space of microbial aggregates and form the structure and architecture of the biofilm matrix.
(Bio)chemistry of bacterial leaching-direct vs. indirect bioleaching.

Computer models development of the phase diagrams of oxide systems makes it possible to analyze in detail the crystallization stages and micro-constituents for any part of phase diagrams of oxide systems, even with very complex structure [9].
Taylor, Cement Chemistry, Academic Press, London, 1990
Aleksenko et al, Phisical Chemistry of Silicates, ed. by A.A.