RESEARCH ON STRUCTURE AND PROPERTY OF OIL FLAX FIBER

In this paper investigations of the macromolecular chain structure, crystalline andmorphological structure of oil flax of San Xi and flax of East-North by means of such as elec-tron microscopy, X-ray diffraction, density and birefringence etc. is presented. The physical andmechanical properties of fibers are also measured. The results show that there is a little differencebetween the macrostructure of two kinds of flax fibers. The count which is an average linear den-sity of single fiber from different parts (root, middle, top of the stem), of the oil flax and that ofthe flax from East-North is 3.28 dtex and 3.29 dtex respectively. The modulus, breaking tenacityand elongation of oil flax are 1835.63 cN / tex, 61.08 cN / tex and 3.62% respectively. Com-paring this data with the data of flax, we find that there exists no appreciable difference.     

THE INFLUENCE OF DRAWING CONDITIONS OF PET POY ON STRUCTURE AND PROPERTY OF THE FIBER

Drawing tests upon PET POY have been made by using dynamic thermal stress analyser,which show that the dynamic thermal stress of fiber is readily affected by drawing conditions. Aseries of samples have been obtained under different drawing velocities, drawing temperatures anddraw ratios. The variations of structural factors of fiber such as the orientation, crystallinity,crystallite size and the thermal shrinkage have been measured. It is proved through experimentsthat the thermal shrinkage(Y) of the drawn fiber of PET POY is influenced by the orientation (rep-resented by sonic velocity x_1) and crystallinity (x_2) of the fiber. The quantitative relationship is es-tablished using the binary regression method: Y=10.2246+2.2030x_1-26.2670x_2 The mechanical properties such as tenacity, elongation, yield stress, initial modulus and the te-nacity at 10% elongation, etc. have also been measured. The relations between the tenacity at 10%elongation (D) and drawing velocity(V), draw ratio (DR), drawing temperature (T), and sonic ve-locity and crystallinity have been obtained using a method of mathematical statistics: D=4.594-0.009 6V , D=-8.937+7.170DR, D=2.866+0.00629T, D=-7.34+2.866x_1+6.314x_2 These equations fit well with data from the experiments. This work will be benefical to the control of quality of products and the development of newproducts.     

RESEARCH ON THE STRUCTURE AND THE PROPERTY OF THE HYGROSCOPIC AND PERMEABLE FABRIC FOR SPORTSWEAR

Two structure models for knitting fabric are set up according to the wet-heat transmission principle of the fabric. Four kinds of knitted fabrics for sportswear are designed and produced. The wet-heat property of these fabrics is researched.     

KNIT FABRIC SURFACE PROPERTY AND MOISTURE TRANSFER

This paper deals with the properties of the fabric such as surface compression energy, the thick,ness, surface hairness, compressional resilience and effect of these factors on the moisture transport.In the course of the present investigation, the possibility of expressing the relationship between thethickness and the pressure as a hyperbolic function is considered, and compressional resilience is al-so described by relative compression energy loss. The vapor resistance of fabric in terms of still air layer and mathematical model of vaportranspiration are elucidated and ten samples from various double knit fabrics made on the same ma-chine are tested in this study and a multivariate linear regression model is suggested. It is found thatthe thickness of fabric is the strongest factor in the mathematical model of vapor evaporation.     

ADSORPTION AND FLOCCULATION BEHAVIORS OF ILMENITE AND FELDSPAR IN THE PRESENCE OF SULPHONATED POLYACRYLAMIDE——Experimental

The adsorption of Sulphonated polyacrylamide(PAMS)on ilmenite and feldspar fromaqueous solution and the floeculation of minerals by PAMS have been studied.The researchresults reveal that the strong adsorption of PAMS on ilmenite results in its strongflocculation and the weak adsorption of PAMS on feldspar causes its dispersion to be morestable.The mechanism of PAMS bonding is discussed in terms of co-ordination and H-bonding interaction respectively in the light of molecular orbit.The co-ordination between—So_3~- on PAMS chain and sites of Ti~(4+) or Fe~(2+) on ilmenite was testified by electron spec-troscopy(PHI550ESCA/AES).Consequently new technology“Bulk flocculation-magneticsepa-ration-ultrasonic deflocculation-magnetic separation”for fine ilmenite/titano-magnetite/feld-spar system has been successfully developed.     

A STUDY ON THE MOLECULAR SIZE RANGE AND CORROSION INHIBITION PROPERTY OF THE GMT-A AGENT

本文介绍了水处理药剂ＧＭＴ＿Ａ的缓蚀性能与其分子量大小的关系．研究结果表明，经高速离心机分离后所得的ＧＭＴ＿Ａ低分子量组份（Ｍｒ＝５×１０２～８×１０４）具有良好的缓蚀性能，而高分子量组份（Ｍｒ＞８×１０５）具有良好的絮凝净化作用．研究还证实，ＧＭＴ＿Ａ水处理剂在絮凝净化与缓蚀两方面都具有比上述单一组份更优越的应用效果，表明药剂ＧＭＴ＿Ａ分子间有协同效应作用．     

HOMOPOLYMERS AND COPOLYMERS OF GLYCOLIDE AND LACTIDE

The homopolymerization and copolymerization of glycolide (GA) and lactide (LA) are des-cribed. The resulting polymers are characterized by differential scanning calorimetry (DSC),thermogravimetric analysis (TGA), 300 MHz proton nuclear magnetic resonance spectroscopy(NMR), infrared spectroscopy, and X-ray diffraction. The rheological properties of PGA andPGLA 910 are evaluated by shear experiments. The biodegradation has been studied in vivo. Theresults show that the polyesters can be absorbed by the muscles of rabbits after 60 days.     

THE COMPARISON OF STRENGTH PROPERTY BETWWEEN KRAFT PULP AND ALKALINE SULFITE-ANTHRAQUINONE PULP FOR THICKER CELL WALL FIBER MATERIALS

INTRODUCTIONMany studies on the strengths of AS-AQ pulp have been carried out. Generally speaking, except lower tear strength, other strength properties of AS-AQ pulp are similar to those of KP. Some even higher than KP[1,2]. Macleod[3] find that the difference in tear strength between the AS-AQ pulp and KP of aspen can be decreased about bleaching. McDonough et al[4] point out that at the same beating degree, the tear strength of AS-AQ pulp is lower than that of KP, but at the …