Miscibility and crystallization of poly(beta-hydroxybutyrate)/poly(vinyl acetate-co-vinyl alcohol) blends

	Miscibility and crystallization of poly(beta-hydroxybutyrate)/poly(vinyl acetate-co-vinyl alcohol) blends
	Xing PX ; Ai X ; Dong LS ; Feng ZL
刊名	macromolecules
	1998
卷号	31 期号:20 页码:6898-6907
关键词	ANGLE X-RAY POLY(ETHYLENE OXIDE) BLENDS POLY(VINYLIDENE FLUORIDE) THERMAL-BEHAVIOR GROWTH-RATE POLY(EPICHLOROHYDRIN) BLENDS ALCALIGENES-EUTROPHUS GLASS-TRANSITION PHASE-STRUCTURE CRYSTAL-GROWTH
ISSN号	0024-9297
通讯作者	xing px
中文摘要	poly(vinyl acetate-co-vinyl alcohol) copolymers (p(vac-co-va)) were synthesized by hydrolysis-alcoholysis of pvac. the miscibility, crystallization, and morphology of poly(p-hydroxybutyrate) (phb) and p(vac-co-va) blends were studied by differential scanning calorimetry, optical microscopy (om), and saxs. it is found that the p(vac-co-va)s with vinyl alcohol content of 9, 15, and 22 mol % will form a miscible phase with the amorphous part of phb in the solution-cast samples. the melting-quenched samples of phb/p(vac-co-va) blends with different vinyl alcohol content show different phase behavior. phb and p(vac-co-va9) with low vinyl alcohol content (9% mel) will form a miscible blend in the melt state. phb and p(vac-co-va15) with 15 mol % vinyl alcohol will not form miscible blends while phb/p(vac-co-va15) blend with 20/80 composition will form a partially miscible blend in the melt state. phb and p(vac-co-va22) with 22 mol % vinyl alcohol are not miscible in the whole composition range. the single glass transition temperature of the blends within the whole composition range suggests that phb and p(vac-co-va9) are totally miscible in the melt. the crystallization kinetics was studied from the whole crystallization and spherulite growth for the miscible blends. the equilibrium melting point of phb in the phb/p(vac-co-va9) blends, which was obtained from dsc results using the hoffman-weeks equation, decreases with the increase in p(vac-co-va9) content. the negative value of the interaction parameter determined from the equilibrium melting point depression supports the miscibility between the components. the kinetics of spherulitic crystallization of phb in the blends was analyzed according to nucleation theory in the temperature range studied in this work. the best fit of the data to the kinetic theory is obtained by employing wlf parameters and the equilibrium melting points obtained by dsc. the addition of p(vac-co-va) did not affect the crystalline structure of phb, as shown by the waxd results. the long periods of blends obtained from saxs increase with the increase in p(vac-co-va) content. it indicates that the amorphous p(vac-co-va) was rejected to interlamellar phase corporating with the amorphous part of phb.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000076389300023
公开日期	2010-11-04
内容类型	期刊论文
源URL	[http://202.98.16.49/handle/322003/22683]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Xing PX,Ai X,Dong LS,et al. Miscibility and crystallization of poly(beta-hydroxybutyrate)/poly(vinyl acetate-co-vinyl alcohol) blends[J]. macromolecules,1998,31(20):6898-6907.
APA	Xing PX,Ai X,Dong LS,&Feng ZL.(1998).Miscibility and crystallization of poly(beta-hydroxybutyrate)/poly(vinyl acetate-co-vinyl alcohol) blends.macromolecules,31(20),6898-6907.
MLA	Xing PX,et al."Miscibility and crystallization of poly(beta-hydroxybutyrate)/poly(vinyl acetate-co-vinyl alcohol) blends".macromolecules 31.20(1998):6898-6907.