The effect of expansion conditions on the batch foaming dynamics of St-MMA copolymer

被引：17

作者：

Azimi, Hamid Reza ^{[1
]}

Rezaei, Mostafa ^{[1
]}

Abbasi, Farhang ^{[1
]}

机构：

[1] Sahand Univ Technol, Inst Polymer Mat, Dept Polymer Engn, Tabriz, Iran

来源：

JOURNAL OF CELLULAR PLASTICS | 2012年 / 48卷 / 02期

关键词：

St-MMA copolymer; foaming dynamics; n-pentane; suspension polymerization; INDUCED BUBBLE-GROWTH; MOLECULAR-WEIGHT; DEGRADATION; SIMULATION; NUCLEATION; EXTRUSION; POLYMERS; STYRENE; LIQUIDS; MODELS;

D O I：

10.1177/0021955X11432960

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In this study, we synthesized styrene-methyl methacrylate copolymer particles by suspension polymerization process to study the foaming dynamics via visual batch foaming apparatus. The weight ratio of styrene-methyl methacrylate was 53-47. The foaming system consisted of a self-sealing observation cell equipped with two glass windows and a stereo microscope attached with a high-speed digital camera as well as a pressure and temperature controller. The required pentane pressure was supplied by heating a small pentane flask. The synthesized copolymer particles impregnated by pentane and then the foaming dynamics were recorded after a rapid pressure release. The effect of different foaming conditions, such as temperature, impregnation time, and impregnation pressure on the expansion ratio of styrene-methyl methacrylate copolymer was investigated. It was concluded that impregnation pressure, time, and temperature have different effects on the foaming ratio at impregnation pressures lower and higher than 4 bar.

引用

页码：125 / 140

页数：16

共 33 条

[1] Non-isothermal degradation kinetics of MMA-St copolymer and EPS lost foams [J].

Azimi, Hamid Reza ;

Rezaei, Mostafa ;

Abbasi, Farhang ;

Charchi, Ali ;

Bahluli, Yahya .

THERMOCHIMICA ACTA, 2008, 474 (1-2) :72-77

[2] Thermo-oxidative degradation of MMA-St copolymer and EPS lost foams: Kinetics study [J].

Azimi, Hamid Reza ;

Rezaei, Mostafa ;

Abbasi, Farhang .

THERMOCHIMICA ACTA, 2009, 488 (1-2) :43-48

[3] Microcellular sheet extrusion system process design models for shaping and cell growth control [J].

Baldwin, DF ;

Park, CB ;

Suh, NP .

POLYMER ENGINEERING AND SCIENCE, 1998, 38 (04) :674-688

[4] Nuclear magnetic relaxation in polyolefin resins [J].

Doolan, KR .

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2002, 40 (06) :572-584

[5] NUCLEATION AND GROWTH OF GAS BUBBLES IN ELASTOMERS [J].

GENT, AN ;

TOMPKINS, DA .

JOURNAL OF APPLIED PHYSICS, 1969, 40 (06) :2520-&

[6] A microcellular foaming simulation system with a high pressure-drop rate [J].

Guo, Qingping ;

Wang, Jin ;

Park, Chul B. ;

Ohshima, Masahiro .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2006, 45 (18) :6153-6161

[7] Controllable radical copolymerization of styrene and methyl methacrylate using 1,1,2,2-tetraphenyl-1,2-bis(trimethylsilyloxy) ethane as initiator [J].

Guo, ZR ;

Yang, GJ ;

Wan, DC ;

Huang, JL .

JOURNAL OF APPLIED POLYMER SCIENCE, 2001, 82 (06) :1474-1482

[8] STUDIES ON STRUCTURAL FOAM PROCESSING .1. RHEOLOGY OF FOAM EXTRUSION [J].

HAN, CD ;

VILLAMIZAR, CA .

POLYMER ENGINEERING AND SCIENCE, 1978, 18 (09) :687-698

[9] Preparation and Characterization of Expandable St/MMA Copolymers Produced by Suspension Polymerization [J].

Jalili, K. ;

Abbasi, F. ;

Nasiri, M. ;

Ghasemi, M. ;

Haddadi, E. .

JOURNAL OF CELLULAR PLASTICS, 2009, 45 (03) :197-224

[10] A review of physical and kinetic models of thermal degradation of expanded polystyrene foam and their application to the lost foam casting process [J].

Kannan, Pravin ;

Biernacki, Joseph J. ;

Visco, Donald P., Jr. .

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 2007, 78 (01) :162-171

← 1 2 3 4 →