Lower critical solution temperature and upper critical solution temperature phase behaviour in random copolymer blends: poly(styrene-co-acrylonitrile)/poly(methyl methacrylate) and poly(styrene-co-acrylonitrile)/poly(ɛ-caprolactone)

Polymer ◽  
1995 ◽  
Vol 36 (14) ◽  
pp. 2761-2764 ◽  
Author(s):  
N Higashida
Keyword(s):  
Methyl Methacrylate ◽  
Lower Critical Solution Temperature ◽  
Random Copolymer ◽  
Phase Behaviour ◽  
Solution Temperature ◽  
Temperature Phase ◽  
Critical Solution Temperature ◽  
Poly Methyl Methacrylate ◽  
Copolymer Blends ◽  
Upper Critical Solution Temperature

Polymer Fractionation at a Lower Critical Solution Temperature Phase Boundary

1967 ◽  
Vol 40 (5) ◽  
pp. 1544-1552
Author(s):  
C. H. Baker ◽  
C. S. Clemson ◽  
G. Allen
Keyword(s):  
Molecular Weight ◽  
Phase Boundary ◽  
Lower Critical Solution Temperature ◽  
Solution Temperature ◽  
Temperature Phase ◽  
Critical Solution Temperature ◽  
Upper Critical Solution Temperature ◽  
Two Samples ◽  
Polymer Fractionation ◽  
Molecular Weight Fractions

Abstract The influence of pressure on a lower critical solution temperature is much more pronounced than on an upper critical solution temperature. Accordingly it is possible to control phase separation at a LCST phase boundary under isothermal conditions by merely adjusting the pressure on the system. An apparatus has been constructed to investigate the isothermal fractionation of polyisobutene in which precipitation is controlled by pressure. Two samples of polyisobutene of Mv=1.76×106 and 9.0×104 have been fractionated in isopentane solution so as to yield up to six and nine fractions respectively. The integral molecular weight distribution curves thus obtained are compared with those obtained from conventional fractionations at an UCST. The sensitivity of the method is poor with regard to the separation of low molecular weight fractions and degradation occurs at the higher temperatures to an appreciable extent.

Quasi-homogeneous catalytic reaction and heterogeneous separation over Pd nanoparticles supported on modified poly(methyl methacrylate) with an upper critical solution temperature

2020 ◽  
Vol 10 (18) ◽  
pp. 6387-6392
Author(s):  
Jinyu Cheng ◽  
Juan Zhou ◽  
Zhiqiang Wang ◽  
Minghui Zhang
Keyword(s):  
Methyl Methacrylate ◽  
Catalytic Reaction ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
Hydrogenation Catalyst ◽  
Solution Temperature ◽  
Critical Solution Temperature ◽  
Poly Methyl Methacrylate ◽  
Upper Critical Solution Temperature ◽  
Excellent Catalytic Performance

A smart hydrogenation catalyst based on modified poly(methyl methacrylate) was prepared and showed excellent catalytic performance.

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