Influences of Polymerization Temperature on Some Structures and Properties of Poly(vinyl chloride)Resin

Abstract

Abstract: Poly(vinyl chloride)(PVC) resins were synthesized at different polymerization temperatures( T ) by suspension process. The average molecular weight ( M ), syndiotacticity, crystallinity and glass transition temperature (T_g) of PVCresin were characterized by GPC, ¹³ C NMR and DSC methods. The results showed that M decreased as T increased, the logarithmic values of M were proportional to the reciprocal of T, the syndiotacticity, crystallinity and T_g increased with decreasing of T, the calculated crystallinity based on the syndiotacticity approached to the experimental value in the case of the value of the minimum sequence length for syndiotactic chain segment contributing to the crystallites was 6.

Key words: Poly(vinyl chloride), Polymerization temperature, The average molecular weight, Syndiotacticity, Crystallinity

CLC Number:

O631.1

TrendMD:

BAO Yong-Zhong, WENG Zhi-Xue, HUANG Zhi-Ming, PAN Zu-Ren . Influences of Polymerization Temperature on Some Structures and Properties of Poly(vinyl chloride)Resin[J]. Chem. J. Chinese Universities, 1998, 19(2): 313.

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Influences of Polymerization Temperature on Some Structures and Properties of Poly(vinyl chloride)Resin

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