Document XRvNJDGbOLNjZk4EBV6Z4e7Zx

^5 - 3VS'*- BK nCHNKAl DOCUMENT B F GOODRICH RESEARCH AND DEVELOPMENT DIVISION THE B.F. GOODRICH CO. JUN 3 1980 RESEARCH LIBRARY Smoke Reduction Mechanisms in PVC. VI. The Performance of Smoke Retarders in Head-To-Head PVC During Pyrolysis and Combustion 20785001 CORPORATE RESEARCH - 4008F-80 CORPORATE TECHNICAL SUPPORT - 9101-80 RESEARCH REPORT March 31, 1980 Information from this doccuummeent^mmay^ not be copied in whole or in part without the consent of 8FG-8783-B BFGoodrich Research and Development Center Corporate Research, 4008F-80 Corp. Tech. Support, 9101-80 RR, March 31, 1980 DISTRIBUTION CORPORATE SUPPORT GROUP CHEMICAL GROUP Corporate Planning M K. Wolverton* Corporate Development F. C. Dietz* Patent Law E. G. Florlto J. R. Lindsay OPERATIONS SUPPORT GROUP J. T. Norman R. J. Fawcett Planning & Control D. G. Barger* A. N. Sltabkha* Plastics Division F. E. Kartise M. M. O'Mara H. Goodman* F. J. Donat Elastomers Division K. Greene* R. L. Stellar* Latex Division E. J. Sehm* A. W. MeRove D. tf. Ash Corporate Information Center R & D Files (2) Corporate Research D. E. Ley E. D. Dickens, Jr. P. P. Nicholas J. M. Marks M. P. Dreyfuss G. S. Huvard M. H. Lehr R. G. Parker Corporate Technical Support C. H. Lufter J. B. Pausch Additives & Speciality Chemicals Division R. A. Krueger* H. 0. Jacobsen G. A. Lindsay M. E. Roha/F. T. Boron Staff Technical Services (ALTC) L. C. Crider R. F. Koebel J. A, Nlkora R. A. Yount-G. F. Smith International Development J. M. Peterson* TIRE GROUP Technology Assessment & Planning C. E. Wilkes Brecksville R. G. Bauman ENGINEERED PRODUCTS GROUP J. A. McKay* A. D. Klingenberg/T. R. Kikendall* J. M. Foulk R. S. Varga Industrial Products Division P. E. Perry TransDortation Products Division E. A. Perry _ tr& ZiltoSSLQZ * Summary only 0FG>d793-8 BFGoodrich Reseorch ond Development Confer 2 Corporate Research, 4008F-80 Corp. Tech. Support, 9101-80 RR, March 31, 1980 SUMMARY Zlhis report presents mv study of the pyrolysis and combustion behavior of head-to-head (H-H) PVC and smoke retarded H-H PVC. The results provide additional support for conclusion that the primary role of metal smoke retarders in PVC is to promote crosslinking during the early stages of dehydrochlorination via a "reductive coupling" mechanism.3 *7 *22 /H-H PVC differs structurally from H-T PVC in that it consists of alternating 1,2-dichloroethylene and ethylene groups along the chaizu] Because the chlorines are always on adjacent carbon atoms, H-H PVC should have a different pattern of thermal degradation,compared to "normal" heterotactic head-to-tail (H-T) PVC. (jfe1 finr tliav~relative to H-T PVC, H-H PVC produces less aromatic pyrolyzate (benzene and toluene), less smoke and more char. This-ia consistent with the results ol the II 11 PVC thermal degradation studies reported in the literature. review of the literature covering the structure and thermal degradation of PVC is included in this report. [Wt find that /the addition of average performing smoke retarders (suciPas M0O3) to H-H PVC gives polymer compounds with superior com bustibility characteristicsj We conclude that a~study of H-H PVC and related polymers could lead to a class of commercially important chlor inated polymers with superior combustibility properties^ 20785003 9FG-8783-6 BFGoodrich Research and Development Center 3 Corporate Research, 4008F-80 Corp. Tech. Support, 9101*80 RR, March 31, 1980 TABLE OF CONTENTS SUMMARY...................................................................................................................... 3 OBJECTIVES ............................................................................................................. 4 CONCLUSIONS ........................................................................................................ 5 PATENT SITUATION............................................................................................... 6 STATUS ....................................................................................................................... 6 INTRODUCTION ........................................................................................................ 7 EXPERIMENTAL PART. .......................................................................................... 8 LITERATURE REVIEW: STRUCTURE AND THERMAL DEGRADATION OF HEAD-HEAD PVC . . . . ............................................................................. 12 RESULTS AND DISCUSSION...................................................................................... IS ACKNOWLEDGEMENTS.................................................................................................... 24 REFERENCES.................................................................................................................. 25 fc\)Q58Z. 0 2 8FS-a733-B BFGoodhch Research and Development Center 4 OBJECTIVES Corporate Research, 40081-60 Corp. Tech. Support, 9101-60 RR, March 31, 1980 1. To characterize the thermal decomposition of H-H PVC and smoke retarded H-H PVC using PT-GC and the Smoke Char Test. 2. To determine if metal-based smoke retarders are as effective in H-H PVC as in H-T PVC. 3. To test our theory that the primary role of metal-based smoke retarders is to promote crosslinking during the initial stages of dehydrochlorination via a "reductive coupling" mechanism. 4. To review the key literature which details the structure and ther mal decomposition of H-H PVC end related polymers. S0DS840Z BFG4783-B BFGoodrich Research and Development Center