Determination of the Molecular Weight of Linear Polymers From Viscosity Measurements Carried out in the Solvent Mixtures

E. PULAT

doi:https://doi.org/10.1501/Commub_0000000339

Makale detayları

Determination of the Molecular Weight of Linear Polymers From Viscosity Measurements Carried out in the Solvent Mixtures

Yazarlar:

E. PULAT

Yayıncı:

Ankara University

Ana Başlıklar:

Kimya mühendisliği

Dergi:

Communications Faculty of Sciences University of Ankara Series B Chemistry and Chemical Engineering 1989 Vol.35, pp.0-0

Belge Tipi:

Makale

Yayın Tarihi:

12/1988

Belge Dili:

İngilizce

Document ID (Org No.):

2000710299

Sıklık:

İki Yıllık

eISSN:

2687-4806

pISSN:

1303-6017

DOI:

https://doi.org/10.1501/Commub_0000000339

Özet:

 

In this work polyvinyl acetate prepared by B. D. H Laboratory »Chemicals Di- vision has been used. The intirinsic viscosities have been determined in acetone-benzene mixtures of various percentâges. By using these intrinsic viscosity values the viscosity average molecular weights of the same polyvinyl acetate sample have been calculated from this relationship:
[?]] = K' M»'	(1)
In this equation the values of K and a' are calculated from the following equations:
K' =	— Ki (1—fi)3 + K2 (1—fi)3 (2)
a' = «ı fi + a2 ( 1—fı)	(3)
Where fi stands for the volüme fraction of one solvent in the solution. Kn aı and K2, a2 are constants for a given polymer-solvent system and temperature.
The values of Kn aı and K2, a2 are given in the literatures [1, 2 ] for polyvinyl ace- tate-benzene and polyvinyl acetate-acetone systems.
The values of the molecular weight abtained by this method are satisfactorily good within experimental errors. The benzene-acetone mixture is better than püre ben¬zene and acetone as solvent for the polyvinyl acetate. Especially the solution containing 20-40 % benzene is the most effective solvent for this polymer. Here polar and nonpolar parts of the polymer are respectively affected by acetone and benzene.

Makale detayları

Determination of the Molecular Weight of Linear Polymers From Viscosity Measurements Carried out in the Solvent Mixtures

Yazarlar: E. PULAT

Yayıncı: Ankara University

Ana Başlıklar: Kimya mühendisliği

Dergi: Communications Faculty of Sciences University of Ankara Series B Chemistry and Chemical Engineering 1989 Vol.35, pp.0-0

Belge Tipi: Makale

Yayın Tarihi: 12/1988

Belge Dili: İngilizce

Document ID (Org No.): 2000710299

Sıklık: İki Yıllık

eISSN: 2687-4806

pISSN: 1303-6017

DOI: https://doi.org/10.1501/Commub_0000000339

Sayı

Yazarlar:

E. PULAT

Yayıncı:

Ankara University

Ana Başlıklar:

Kimya mühendisliği

Dergi:

Communications Faculty of Sciences University of Ankara Series B Chemistry and Chemical Engineering 1989 Vol.35, pp.0-0

Belge Tipi:

Makale

Yayın Tarihi:

12/1988

Belge Dili:

İngilizce

Document ID (Org No.):

2000710299

Sıklık:

İki Yıllık

eISSN:

2687-4806

pISSN:

1303-6017

DOI:

https://doi.org/10.1501/Commub_0000000339