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FR2357887A1 - Variable shear rate rheometer for monitoring continuous polymerisation - esp. for prodn. of various grades of high pressure polyethylene - Google Patents

Variable shear rate rheometer for monitoring continuous polymerisation - esp. for prodn. of various grades of high pressure polyethylene

Info

Publication number
FR2357887A1
FR2357887A1 FR7621115A FR7621115A FR2357887A1 FR 2357887 A1 FR2357887 A1 FR 2357887A1 FR 7621115 A FR7621115 A FR 7621115A FR 7621115 A FR7621115 A FR 7621115A FR 2357887 A1 FR2357887 A1 FR 2357887A1
Authority
FR
France
Prior art keywords
high pressure
esp
prodn
capillaries
pressure polyethylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7621115A
Other languages
French (fr)
Other versions
FR2357887B1 (en
Inventor
Jean-Paul Leca
Alain Nardi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Orkem SA
Original Assignee
Chimique des Charbonnages SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chimique des Charbonnages SA filed Critical Chimique des Charbonnages SA
Priority to FR7621115A priority Critical patent/FR2357887A1/en
Publication of FR2357887A1 publication Critical patent/FR2357887A1/en
Application granted granted Critical
Publication of FR2357887B1 publication Critical patent/FR2357887B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
    • G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
    • G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
    • G01N11/08—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture by measuring pressure required to produce a known flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/44—Resins; Plastics; Rubber; Leather
    • G01N33/442—Resins; Plastics

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

A rheometer which comprises two capillaries of differing diameter mounted in series, fed by a constant speed pump and discharging into a chamber against a controlled pressure. Two transducer measure the pressure drop down the first and larger of the two capillaries. The capillaries are enclosed in a temp. controlled block. Used esp. for sampling a flow stream during a continuous polymerisation process, e.g. mfr. of high pressure polyethylene, to control the process w.r.t. to the viscoelastic properties of the material. The device is more precise and versatile than control rheometers operating in a closed loop discharging back into the product stream against a variable back-pressure. It is simple to construct and install.
FR7621115A 1976-07-09 1976-07-09 Variable shear rate rheometer for monitoring continuous polymerisation - esp. for prodn. of various grades of high pressure polyethylene Granted FR2357887A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7621115A FR2357887A1 (en) 1976-07-09 1976-07-09 Variable shear rate rheometer for monitoring continuous polymerisation - esp. for prodn. of various grades of high pressure polyethylene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7621115A FR2357887A1 (en) 1976-07-09 1976-07-09 Variable shear rate rheometer for monitoring continuous polymerisation - esp. for prodn. of various grades of high pressure polyethylene

Publications (2)

Publication Number Publication Date
FR2357887A1 true FR2357887A1 (en) 1978-02-03
FR2357887B1 FR2357887B1 (en) 1978-12-15

Family

ID=9175527

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7621115A Granted FR2357887A1 (en) 1976-07-09 1976-07-09 Variable shear rate rheometer for monitoring continuous polymerisation - esp. for prodn. of various grades of high pressure polyethylene

Country Status (1)

Country Link
FR (1) FR2357887A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115768A (en) * 1959-10-26 1963-12-31 Standard Oil Co Viscosimeter apparatus
GB1375862A (en) * 1972-02-03 1974-11-27

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115768A (en) * 1959-10-26 1963-12-31 Standard Oil Co Viscosimeter apparatus
GB1375862A (en) * 1972-02-03 1974-11-27

Also Published As

Publication number Publication date
FR2357887B1 (en) 1978-12-15

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Legal Events

Date Code Title Description
ST Notification of lapse