Progress of polymeric modification technologies for cracking C_5 petroleum resin;

And the technical methods of preparation and application of high performance mortar by Point-DGN high performance mortar additive through low-dosage(1～3%) polymer modification were discussed also.

Among these areas,the applications in polymer modification have become research focus at home and abroad in recent years.

Here the general application of MMA(methyl methacrylate) in polymer concrete is told,the conditions for the use of the polymer are explained and some suggestions for the polymer modification are given.

During wash and wear finish of pure cotton fabric,the water soluble low molecule modified polymer Serirez AP-ZF was used to increase the crease resistance,ensure the strength and reduce the water shrinkage of finished fabric without free formaldehyde.

The BYJ series of non fluorescent multifunctional drilling/completion fluid additives for formation damage control, BYJ 1- 5 , chemically being modified polyols of different cloud point, have formation damage controlling, anti caving, lubricating, anti foaming, and non thickening properties and are easily degradable at environmental conditions.

Experiment on crack resistance and impermeability of polymer modified mortar;

The author discuss the mechanism of modifying effects of organic compound on cement,and point out that the polymer modified composite should be improved further to provide greater variety,high strengthed and controllable setting time.