SongChao Tang

Name: 唐颂超; Tang, SongChao

Organization: East China University of Science and Technology , China

Department: Shanghai Key Laboratory of Advanced Polymeric Materials

Title: Associate Professor(PhD)

Chemicals
References

Thermal and phase-separation behavior of injection-molded poly(l-lactic acid)/poly(d-lactic acid) blends with moderate optical purity

Co-reporter:Huijun Xu;Jianding Chen;Peimin Yin;Weiliang Pu

Polymer Bulletin 2012 Volume 68( Issue 4) pp:1135-1151

Publication Date(Web):2012 March

DOI:10.1007/s00289-011-0673-y

l-Lactide-rich poly(l-lactide) (LR-PLLA)/d-lactide-rich poly(d-lactide) (DR-PDLA) blends with moderate optical purity were prepared by conventional extrusion and followed by injection-molding process in this study. Thermal properties, crystalline structure, spherulite morphology, melt degradability, and thermal mechanical property were investigated by means of DSC, WAXD, POM, TG, and DMA. In comparison with LR-PLLA/DR-PDLA blends with higher optical purity, stereocomplex with less perfect structure was partially formed from the LR-PLLA/DR-PDLA blends with various compositions and showed lower melting temperature. Surprisingly, double melting peaks have appeared in blends with 40 or 50 wt% DR-PDLA. Annealing at higher temperature for blends with 50 wt% DR-PDLA resulted in three melting peaks. It is assumed that the optical purity would play a critical role, thus, producing limited amount of stereocomplex with less imperfect structure. Annealing would also induce the micro-phase separation behavior in LR-PLLA/DR-PDLA blends and significantly influence the thermal and degradable properties of blends.

Toughening of polycarbonate by core-shell latex particles: Influence of particle size and spatial distribution on brittle-ductile transition

Co-reporter:Huijun Xu;Long Yang;Wenting Hou

Journal of Polymer Science Part B: Polymer Physics 2010 Volume 48( Issue 18) pp:1970-1977

Publication Date(Web):

DOI:10.1002/polb.22075

Abstract

The impact toughness of polycarbonate modified with acrylic core-shell latex particles was investigated. Addition of impact modifiers with size ranging from 115.7 to 231.4 nm can result in maximum impact strength. Equations for spatial distribution of modified particles were proposed to associate the interparticle distance with particle size and modifier volume fraction in terms of two possible morphologies, given by T = d[0.91/(φ)^1/3 − 1] or T = d[0.88/(φ)^1/3 − 1]. The influence of particle size on brittle-ductile transition was also studied. The results indicated that critical interparticle distance was not a definitive value and had a narrow region. Moreover, there existed a linear relationship between critical interparticle distance and modifier size, that is, critical interparticle distance would enlarge with the increasing of core-shell particle size. © 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 48: 1970–1977, 2010

CAS:1802293-54-4

Glycine, polymer with hexahydro-?2H-?azepin-?2-?one, hexanedioic acid and 3-?(triethoxysilyl)?-?1-?propanamine

CAS:1802293-55-5

Glycine, polymer with hexahydro-?2H-?azepin-?2-?one, hexanedioic acid and 3-?(triethoxysilyl)?-?1-?propanamine

1,4-Dioxane-2,5-dione, 3,6-dimethyl-, (3S,6S)-, polymer with dihydro-2,5-furandione, 1,2-ethanediol and α-hydro-ω-hydroxypoly(oxy-1,2-ethanediyl)

CAS:2092934-82-0

1,4-Dioxane-2,5-dione, 3,6-dimethyl-, (3S,6S)-, polymer with dihydro-2,5-furandione, 1,2-ethanediol and α-hydro-ω-hydroxypoly(oxy-1,2-ethanediyl)

Propanoic acid, 2-hydroxy-, polymer with dihydro-2,5-furandione, (3S,6S)-3,6-dimethyl-1,4-dioxane-2,5-dione and α-hydro-ω-hydroxypoly(oxy-1,2-ethanediyl)

CAS:2092934-83-1

Propanoic acid, 2-hydroxy-, polymer with dihydro-2,5-furandione, (3S,6S)-3,6-dimethyl-1,4-dioxane-2,5-dione and α-hydro-ω-hydroxypoly(oxy-1,2-ethanediyl)