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Textile size plays an important role in the textile warp sizing used slurry mainly three categories of starch, polyvinyl alcohol (PVA), and acrylic. PVA slurry is an excellent performance of the slurry, but its not easy to biological degradation, environmental pollution. The universal call today at home and abroad \Starch slurry with its source a wide range, cheap, good environmental performance, renewable advantages to promote the development of graft modified starch slurry. Years of research, there are a lot of grafted starch come out as a slurry. Mostly optional olefin monomer, the initiator with the help of chemical or physical methods to produce reactive groups on the macromolecular chains of starch, so that the group is grafted to the starch chain. The graft copolymer of starch and biodegradable polyhydroxyalkanoates wide attention in recent years biodegradable polymer systems used in the field of biomedical materials and biodegradable plastic, but has not yet reported for warp sizing . This subject the spirit of the idea of ??the green, the use of cyclic esters by ring-opening polymerization, by assembling the graft polymerization apparatus comprising a reaction device, water bath, the stirring device, a condensing device, a vacuum apparatus, to set the appropriate graft polymerization conditions include graft the polymerization reaction of the feed ratio of the monomer ratio, the polymerization time, polymerization temperature, catalyst concentration, hydroxy carboxylic acid, DL-lactic acid, and γ-butyrolactone as the grafting monomer, stannous octoate as catalyst, synthetic starch grafted poly Polyhydroxyalkanoate. Acetone as the solvent, centrifuge separation and purification of polyhydroxyalkanoates starch graft, changes in the graft the grafting rate from 21.54% to 35.07% starch sample. By infrared absorption spectra to verify graft branched - the presence of the polyhydroxyalkanoate. Discussion of starch with DL-lactic acid, gamma-butyrolactone, the graft polymerization reaction mechanism, inference in the graft polymerization reaction, DL-lactic acid generated in the system lactide, lactide carbonate and γ-butyrolactone by ring-opening polymerization grafted starch macromolecules. The synthesis of the grafted starch sample has a different performance, according to the pulp with the performance of several evaluation indexes such as the slurry viscosity, the slurry viscosity stability, slurry adhesion, sizing enhanced rate, sizing wearable different grafting conditions times, sizing hairiness index screening several graft starch sample, determine the the grafted starch slurry performance better reflect the graft polymerization conditions. Re-implementation of the graft polymerization experiments to verify the performance of the graft polymerization reaction, the synthesis of the grafted starch with reproducibility. Select a series of commonly used slurry including acid hydrolysis starch slurry and acid hydrolysis of starch / PVA mixed slurry with grafted starch sample pulp with performance comparison analysis of starch from the physical and chemical action between the polymer molecules, then The sticks polyhydroxyalkanoates the slurry obtained: Performance starch graft Polyhydroxyalkanoates can be applied in the slurry field and control the synthesis of graft polymerization conditions pulp out with a better performance of the starch graft poly hydroxy alkanoates, for cotton yarn sizing, and Di Miansha sizing; such grafted starch slurry with superior acid hydrolysis of the starch slurry and mixed slurry containing a small amount of PVA, but still mixed slurry exists and containing a higher amount of PVA gap.
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